Meloni’s coalition has pushed a 42% majority-bonus system through the Senate, setting up a decisive lower-house showdown over how Italy will choose its next government in 2027.

Italy’s Senate has approved a sweeping rewrite of the country’s electoral law, sending Prime Minister Giorgia Meloni’s most consequential domestic political gamble back to the Chamber of Deputies and placing the rules for the 2027 general election at the centre of an increasingly bitter contest over stability, representation and political survival. The bill, passed on September 15 by 113 votes to 71 with two abstentions, would replace Italy’s current mixed electoral system with a predominantly proportional model, award a parliamentary majority bonus to a coalition that reaches 42% of the vote in both chambers, and require competing alliances to identify their candidate for prime minister before polling day. Supporters describe the plan as an effort to make governments more durable. Opponents say the governing right is redesigning the system because it fears that the present rules could help a newly competitive centre-left defeat it next year.

A Senate vote that changes the stakes for 2027

The immediate parliamentary arithmetic was clear. Meloni’s governing coalition — led by Brothers of Italy and supported by the League and Forza Italia — had enough votes in the Senate to move the legislation forward. But the political significance of the vote lies less in the size of the majority than in what the bill would do to the competitive terrain of the next national election.

Under the current Rosatellum system, roughly one third of parliamentary seats are awarded in single-member constituencies using first-past-the-post rules, while the rest are distributed proportionally. The proposed reform would abolish those single-member contests and make proportional representation the core of the system. A coalition that secured at least 42% in both the Chamber of Deputies and the Senate would then receive bonus seats designed to give it a working parliamentary majority.

The Senate version provides for a bonus of 70 seats in the 400-member Chamber and 35 in the 200-member Senate, subject to caps that prevent the winner from accumulating an overwhelming supermajority simply through the bonus mechanism. If no coalition reaches 42%, or if the threshold is not met in both chambers by the same alliance, seats would be allocated proportionally without the bonus.

That design makes the law neither a straightforward proportional system nor a conventional winner-takes-all mechanism. It is an attempt to combine proportional representation with a governability guarantee, a formula Italy has tried in different forms for decades as governments repeatedly struggled with unstable majorities, coalition breakdowns and short political cycles.

The governing parties argue that voters should be able to choose not only among parties but among competing governing projects and that the electoral system should produce a result capable of sustaining a cabinet for a full legislature. Opposition parties counter that electoral systems should primarily translate votes into representation and that a law designed by an incumbent coalition shortly before an election inevitably raises questions about partisan advantage.

The 42% threshold at the heart of the dispute

The most contested feature is the 42% threshold for the majority bonus. The figure matters because it sits well below an absolute majority of votes while potentially delivering an absolute majority of parliamentary seats.

Government supporters say the threshold is high enough to ensure that the bonus is available only to a coalition with broad national support. They also note that Italian electoral law has previously included majority bonuses and that the Constitutional Court, in its 2017 ruling on the earlier Italicum law, did not reject the principle of a bonus when linked to a meaningful vote threshold. In that case, the court allowed a 40% threshold for a majority bonus to stand while striking down other elements, including a run-off mechanism.

The opposition argues that the present proposal must be judged as a whole rather than by analogy with a previous law. Critics say the combination of a bonus, the elimination of single-member constituencies and the requirement that alliances organise around a declared prime-ministerial candidate could distort representation and turn the electoral law into a device for structuring political competition around the needs of the largest blocs.

The constitutional debate is therefore likely to continue even if the bill clears parliament. Italy’s Constitutional Court has repeatedly played a central role in shaping electoral law, and politicians across the spectrum know that legislation affecting the conversion of votes into seats must be constructed with the court’s past rulings in mind.

The governing coalition insists it has done so. Opposition senators nevertheless displayed placards denouncing what they called a “fraud law” before the final vote, language that underscored how little consensus exists around the reform.

Why Meloni is making stability the central argument

The timing is politically striking because Meloni is simultaneously celebrating a record of government longevity and arguing that Italy needs a new electoral system to guarantee stability.

Earlier this month, her administration became the longest-lasting Italian government of the postwar era, surpassing the previous record associated with one of Silvio Berlusconi’s governments. Meloni has presented that milestone as evidence that political continuity has strengthened Italy’s credibility with investors, European partners and international allies.

For the prime minister, stability is not merely a procedural question. It has become one of the defining claims of her premiership. Italy spent much of the postwar period cycling through governments at a pace that often contrasted sharply with the continuity seen in other major European democracies. Meloni argues that her coalition has broken that pattern and that electoral reform can make such continuity structural rather than dependent on the internal discipline of one alliance.

Her allies make a similar case. They say a proportional system with a conditional majority bonus would reduce the risk of inconclusive elections and post-election bargaining in which parties negotiate governments after voters have already cast their ballots.

That is also why the requirement for each coalition to name a candidate for prime minister before the election is politically important. The rule is intended to make competing governing alternatives more visible to voters and to reduce ambiguity about who would lead the country if a coalition wins.

Yet Italy is a parliamentary republic, not a presidential system. The prime minister is formally appointed by the president of the Republic and must command parliamentary confidence. The proposed law does not alter those constitutional rules. Its effect would be political rather than constitutional: coalitions would campaign around a declared candidate, making it harder in practice to replace that figure after an election without appearing to reverse the voters’ expectations.

Opposition says the law is about survival, not stability

Meloni’s opponents reject the government’s framing. Former prime minister Matteo Renzi accused the coalition of acting because it fears it could lose the next election, not because the country faces an urgent institutional crisis.

That critique has become more potent as polling has tightened. Reuters reported this month that the centre-left bloc has held a narrow lead over Meloni’s governing alliance in some surveys, even though Brothers of Italy remains the country’s largest individual party. The gap is small enough that changes in coalition composition could prove decisive.

The opposition’s argument is straightforward: the present electoral system includes single-member constituencies in which a broadly united centre-left could potentially convert a modest national lead into a meaningful number of district victories. Removing those constituencies and shifting to a proportional framework could reduce that advantage.

But the strategic effects are not one-directional. A proportional system with a 42% bonus could also reward the opposition if it succeeds in building a sufficiently broad alliance and crossing the threshold. That is one reason the reform has become more unpredictable as Italy’s party system changes.

The centre-left therefore faces a paradox. It is attacking the law as an attempt to preserve the right’s power while simultaneously recognising that, under some plausible electoral scenarios, the same rules could deliver the majority bonus to an opposition coalition.

This uncertainty complicates claims that the reform has a single guaranteed beneficiary. What is clearer is that it changes the incentives facing every major party, particularly on coalition-building, leadership and relations with smaller allies.

The Vannacci factor changes Meloni’s calculation

The rise of Roberto Vannacci’s Futuro Nazionale has made those calculations more difficult for the prime minister.

Vannacci, a former army general who broke with the League and launched his own movement earlier this year, has built support on hard-line positions on immigration, national identity and social issues. Reuters reported on September 1 that an SWG poll placed Futuro Nazionale at 7.5%, ahead of Forza Italia at 7.1% and the League at 5.7%. Brothers of Italy remained the leading party on 26.8%, but its support had weakened compared with earlier levels.

For Meloni, the challenge is not simply the loss of votes to another party on the right. It is the coalition arithmetic created by a 42% threshold.

If Futuro Nazionale remains outside the governing alliance and continues to attract voters from Brothers of Italy, the League and other right-wing parties, Meloni’s coalition could find it harder to reach the bonus threshold. If she brings Vannacci into an electoral pact, she could increase the coalition’s combined vote but at the cost of giving a rival on her right greater leverage over policy and political identity.

Meloni has rejected suggestions that she intends to form an alliance with Futuro Nazionale. The electoral law nevertheless makes the question harder to avoid. A threshold-based bonus rewards broad pre-electoral coalitions, and every percentage point held by an ideologically adjacent party outside the alliance can become strategically important.

That creates an unusual situation in which a reform initially designed around a relatively stable three-party governing coalition is moving through parliament while the right-wing party system itself is becoming less stable.

The Financial Times reported on September 15 that some analysts believe the new law could strengthen Vannacci’s bargaining position rather than Meloni’s. The prime minister may therefore be pushing forward a system whose political consequences are less predictable than when the project was first conceived.

A law shaped by a previous defeat inside the governing coalition

The Senate vote also carries the memory of a politically damaging episode in the Chamber of Deputies in July.

The lower house had already approved the broad reform, but a government-backed proposal to restore preference voting — allowing electors to indicate preferred candidates on party lists — was unexpectedly defeated in a secret ballot. The loss was widely attributed to defections from within the governing coalition and became evidence of strains that are usually hidden by party discipline.

Meloni did not abandon the idea. The preference mechanism was reintroduced in the Senate, where it passed as part of the amended legislation. Because the Senate changed the text, the bill must now return to the Chamber for another vote.

The new preference system would allow voters to indicate up to three candidates among six on a party list, with candidate names alternating by gender. The top candidate on the list, however, would remain blocked rather than subject to preference voting, a feature the opposition has criticised as limiting the reform’s claim to expand voter choice.

That detail matters because candidate selection has long been a sensitive issue in Italy. Party leaders exercise significant influence over who enters parliament through list placement. Supporters of preference voting argue that it gives citizens more control over individual representation, while critics warn that preference systems can intensify internal party competition and favour candidates with stronger local networks or campaign resources.

The July defeat showed that even apparently technical provisions can become tests of coalition loyalty. When the bill returns to the Chamber, government leaders will therefore be watching not only the official opposition but the behaviour of their own lawmakers.

What voters would notice on the ballot

For citizens, the reform would not be an abstract change in parliamentary mathematics. It would alter how electoral choice is presented and how individual candidates compete for support.

The disappearance of single-member constituencies means voters would no longer elect a local candidate through a winner-takes-all district race for roughly a third of seats. Instead, party and coalition lists in multi-member constituencies would become the dominant channel through which representatives enter parliament. That shifts attention from local head-to-head contests toward list strength, party identity and coalition totals.

The Senate-approved preference mechanism is meant to compensate partly for that change by allowing voters to indicate preferred candidates. According to the text described by ANSA after the September 15 vote, electors would be able to express up to three preferences among six candidates on a list, with names alternating by gender. The list’s top candidate would remain protected from preference competition.

Supporters say this restores a measure of voter influence that is limited under the current system, in which party leaderships have substantial power over list order. Critics say keeping the lead candidate blocked makes the reform only a partial opening and preserves significant control for party organisations.

The design also creates new campaign incentives. Candidates on the same list could find themselves competing for preference votes while still needing to maximise the overall performance of their party and coalition. Parties would have to balance national messaging with the local networks required to mobilise preferences.

For voters, meanwhile, the election would carry several simultaneous choices: which party to support, which coalition should govern, which declared prime-ministerial candidate should lead that coalition, and which individual candidates deserve preference votes. The government presents that combination as greater democratic clarity. The opposition sees a complicated system in which the majority bonus remains the dominant feature.

That disagreement is likely to shape the lower-house debate. Even lawmakers who accept the case for replacing the Rosatellum can disagree over whether this particular mix of proportional representation, preference votes and a coalition bonus offers the right balance.

The next lower-house vote is not a formality

The coalition has a parliamentary majority, but the next stage should not be treated as automatic.

The Chamber is expected to take up the amended bill again later this month. If it approves the Senate text without changes, the measure can complete its parliamentary passage. If deputies amend it, the legislation would have to return to the Senate, extending a process that the government wants to complete well before the 2027 election campaign reaches full intensity.

The political risk comes from the possibility of another secret-ballot rebellion or a renewed dispute among coalition partners over details such as preference voting, the treatment of smaller parties and the precise operation of the bonus.

Meloni’s government has survived disagreements on foreign policy, economic questions and institutional reform in part because none of the coalition partners has had a strong incentive to force an early national election. Electoral law is different because it directly affects each party’s future seat count and bargaining power.

Forza Italia and the League must consider not only whether the reform helps the coalition as a whole but whether it protects their own relevance inside that coalition. A system that rewards alliance unity could strengthen the largest party, Brothers of Italy, while simultaneously making smaller partners essential for crossing the threshold. Those two effects pull in opposite directions.

The same logic applies to candidate selection. Preference voting can empower individual lawmakers and local party structures, potentially reducing central control. That helps explain why such provisions can generate resistance even when party leaders publicly support them.

The centre-left faces its own leadership problem

The requirement that coalitions designate a prime-ministerial candidate before the vote is designed to clarify the choice for voters, but it could create a difficult test for the opposition.

Italy’s centre-left is not a single party. Any competitive alliance would likely need to bridge differences among the Democratic Party, the Five Star Movement and smaller centrist or liberal forces. These groups have cooperated on some issues while remaining divided on others, including economic policy, foreign affairs and leadership.

A rule requiring a common candidate could force those disagreements into the open months before election day.

Rado Fonda of polling firm SWG told Reuters that the provision could trigger an early leadership contest within the centre-left and expose divisions that weaken the bloc. That is precisely the kind of strategic effect the opposition fears: a rule presented as a way to inform voters could also compel parties to settle a politically sensitive leadership question before they have resolved their wider programme.

Yet avoiding that decision would carry its own costs. If the law passes, a coalition that cannot agree on a candidate would struggle to present itself as a credible governing alternative to Meloni, whose personal leadership remains one of the right’s strongest electoral assets.

The reform therefore shifts part of the election from a competition among parties to a competition among pre-assembled governing blocs. That may increase clarity, but it also raises the cost of internal fragmentation.

From Rosatellum to a new proportional model

The proposed law would mark another turn in Italy’s long search for an electoral system that balances representation and governability.

The Rosatellum, adopted in 2017, combines first-past-the-post and proportional elements. According to Italy’s Interior Ministry description of the system, 37% of seats were originally allocated through single-member plurality contests and 63% proportionally. Changes to the number of lawmakers have altered the raw seat totals since then, but the mixed logic remains.

That model encourages coalitions because parties that coordinate in single-member constituencies avoid splitting their vote. In the 2022 election, the centre-right benefited significantly from entering those contests as a relatively unified alliance while opposition parties were more fragmented.

The political environment heading toward 2027 is different. The centre-left has stronger incentives to cooperate, while the rise of Futuro Nazionale complicates unity on the right. Single-member constituencies that once amplified the right’s coalition advantage could therefore become less favourable to it.

The proposed reform would replace that district-level dynamic with a national threshold dynamic. Instead of fighting constituency by constituency for plurality victories, alliances would focus more heavily on accumulating enough national support to cross 42% in both chambers.

That could make smaller parties more valuable as coalition partners even if they cannot win constituencies on their own. It could also intensify pre-election bargaining over common programmes, leadership, candidate placement and the distribution of winnable list positions.

The constitutional argument will outlast the parliamentary vote

Opposition lawmakers have already signalled that they consider parts of the reform constitutionally vulnerable. The government says those claims are politically motivated and legally unfounded.

The history of the Italicum is central to both sides’ arguments. In 2017, the Constitutional Court upheld the principle of awarding a majority bonus to a party that obtained more than 40% of the vote but struck down the law’s run-off system, reasoning that the mechanism could produce an excessive distortion between votes and representation.

Supporters of the current proposal point to that decision as evidence that a threshold-based bonus can be compatible with the Constitution. They also stress that the new threshold is 42%, higher than the 40% benchmark associated with the Italicum.

Critics respond that constitutional review does not operate through a simple numerical test. The court would consider the overall structure of the law, including the size of the bonus, the relationship between the two chambers, the rules for coalitions and the broader principle of reasonable proportionality between votes and seats.

One safeguard in the bill is the requirement that the same coalition meet the threshold in both chambers. If that does not happen, the bonus disappears and proportional allocation applies. The provision is intended to reduce the risk that the electoral system manufactures different governing majorities in the Chamber and Senate.

Whether that is sufficient to withstand future legal challenges cannot be known in advance. Parliament has broad authority to design electoral systems, but Italy’s constitutional jurisprudence has repeatedly insisted that the legislature cannot disregard representative equality and voter choice.

Stability versus representation is the real political divide

Behind the legal arguments lies a deeper disagreement about what an electoral system should prioritise.

Meloni’s coalition views chronic government instability as one of the enduring weaknesses of the Italian state. From that perspective, a system that produces fragmented parliaments and forces extended coalition negotiations can undermine policy continuity, market confidence and Italy’s influence in Europe.

The opposition does not deny Italy’s history of unstable governments, but it argues that stability cannot justify engineering parliamentary majorities disconnected from the distribution of votes.

Both positions reflect real tensions in parliamentary democracy. A purely proportional system can produce highly representative legislatures but may make coalition formation more difficult. Majoritarian systems can produce clearer winners but may leave large numbers of voters underrepresented. Mixed systems attempt to balance those goals, often creating complexity and strategic distortions of their own.

Italy’s repeated changes of electoral law are evidence that no formula has permanently resolved the problem.

The current debate is especially charged because the reform is being pursued by a government that has already demonstrated unusual durability. To supporters, that proves the value of stability and the need to preserve it. To critics, it weakens the claim that an urgent electoral overhaul is required.

A referendum defeat still hangs over the government

The electoral-law battle also follows another institutional confrontation that did not go Meloni’s way.

Earlier in 2026, voters rejected the government’s proposed judicial reform in a referendum. The defeat was politically significant because Meloni had invested personal authority in the campaign and the opposition treated the vote as a national test of her leadership.

The government survived the loss and has since emphasised its record of continuity. But the referendum demonstrated that Meloni’s parliamentary strength does not automatically translate into victory when institutional changes are placed directly before voters.

The electoral reform does not require a referendum simply because it changes election rules. It is ordinary legislation. That gives the governing coalition a clearer procedural path if it can maintain discipline in both chambers.

Politically, however, the judicial referendum remains relevant because it strengthened opposition arguments that the government should seek broader consensus before making major institutional changes.

Meloni’s allies reject the idea that bipartisan agreement is a constitutional prerequisite. They note that previous governments also changed electoral rules amid intense partisan dispute. The opposition replies that repeating past mistakes is not a justification for doing so again.

Why the reform matters beyond Italy

The controversy will be watched outside Italy because Meloni has become one of Europe’s most influential conservative leaders and because the 2027 election could reshape the balance of power inside the European Union.

Her government has combined a hard line on migration and social conservatism with a more pragmatic approach to EU fiscal negotiations and strong support for Ukraine. That combination has allowed Meloni to occupy a distinctive position between mainstream European centre-right parties and more confrontational nationalist movements.

The rise of Vannacci tests that strategy. If Futuro Nazionale continues to attract voters from the governing right, Meloni may face pressure either to sharpen her rhetoric or to find a way of incorporating the new party into a broader electoral alliance.

The electoral law could magnify that pressure. A 42% threshold makes coalition breadth valuable, but any pact with a more radical competitor could complicate Meloni’s relationships with centrist partners at home and with allies abroad.

The centre-left, meanwhile, faces a mirror-image problem. It needs sufficient breadth to cross the threshold but must avoid assembling an alliance so internally divided that it appears unable to govern.

In that sense, the reform is not merely about how seats are counted. It could determine the architecture of the coalitions that contest power, the leaders those coalitions choose and the compromises they make before voters ever enter a polling station.

No side can be certain the new rules will favour it

The most important analytical point is that the bill’s political effects remain uncertain.

Incumbent governments often face suspicion when they change electoral rules, especially close to an election. That suspicion is understandable in Italy, where electoral law has repeatedly been intertwined with partisan strategy.

But the current proposal is moving through a fluid party system. Polls can change. Coalitions can change. Smaller parties can rise or collapse. A rule intended to protect one bloc can become an advantage for another by election day.

If the centre-left sustains a national lead and builds a disciplined coalition capable of reaching 42%, the majority bonus could help it form a stable government. If Meloni reunifies the right and recovers support, the same mechanism could give her a second term with a reliable parliamentary majority. If neither side reaches the threshold, Italy could end up with a fully proportional parliament and the kind of post-election bargaining the reform is meant to avoid.

That final scenario is important. The law does not guarantee governability; it offers a conditional route to it. Its promise of stability depends on electoral behaviour producing a coalition above the threshold.

The possibility that no bloc qualifies means parties will campaign not just to finish first but to cross a specific numerical line. That can alter tactical voting, alliance negotiations and the treatment of smaller political forces.

The lower house now becomes the decisive arena

After the Senate vote, attention turns back to the Chamber of Deputies.

The government wants the law settled well before the formal election campaign begins. The opposition wants to keep pressure on wavering coalition lawmakers and frame the reform as an attempt to rewrite the rules for partisan advantage. Smaller parties on both sides are calculating how the new thresholds and preference rules would affect their survival.

The next vote will therefore test more than the legislation itself. It will test Meloni’s control over a coalition that has remained in office longer than any other postwar Italian government but is entering an election year under new pressure from both the centre-left and the right.

For now, the Senate result gives the prime minister momentum but not final victory. The bill has advanced, yet its return to the lower house reopens the possibility of amendments, defections and procedural delay.

The broader contest is already clear. Meloni wants the next election to be fought as a choice between identifiable governing coalitions, with a mechanism capable of delivering a parliamentary majority to the winner. Her opponents want to prevent the governing right from converting a plurality into durable power through rules they say lack political consensus.

Italy has spent decades searching for an electoral formula that can reconcile representative fairness with stable government. The Senate’s September 15 vote is the latest attempt — and, with a national election due next year, perhaps the most politically consequential one in a generation.