Barnier gets Matignon. Le Pen gets a say in how long he stays.

Michel Barnier has spent years negotiating with governments. His next negotiation is about keeping one.

Emmanuel Macron appointed the former EU Brexit negotiator as France's prime minister on 5 September, almost two months after a parliamentary election left the country without a majority. Barnier took over from Gabriel Attal at Matignon that day. It took another sixteen days to announce his cabinet.

The appointments brought an end to the prolonged wait for a new ministerial team. They did not end the argument over who had the right to govern after July's vote.

Barnier comes from the conservative right, while the New Popular Front, the left alliance that emerged as the largest electoral bloc, remains outside government. Macron's centrists retain substantial representation in the cabinet. Marine Le Pen's National Rally holds no ministries but has the parliamentary strength to influence whether the arrangement survives.

That is the central fact behind the new prime minister's offer of stability. His government does not need every opposition deputy to support it. It needs enough of them to refrain from bringing it down.

By the final week of September, the first major test was already approaching. France required a budget for 2025, and its new budget minister warned that this year's deficit could exceed six percent of national output. Barnier had inherited both an uncertain parliamentary base and a fiscal problem that would force him to make enemies.

The summer ends with a conservative appointment

Macron accepted Attal's resignation on 16 July, after the second round of the legislative election. The outgoing administration continued handling current affairs while the president searched for a successor who could withstand the fragmented National Assembly.

The New Popular Front proposed Lucie Castets. Its constituent parties argued that the election entitled the alliance to lead the next government and seek support for its programme in parliament.

The Élysée rejected that path in a statement on 26 August. It argued that a government based only on the alliance's parties and platform would face an immediate majority against it, preventing it from acting. The presidency presented institutional stability as the reason for continuing consultations.

That was an assessment of prospective parliamentary behaviour, not a vote that had actually taken place. The left objected that it was being denied the chance to negotiate and test its support. Macron's opponents saw the process as a means of preserving his policies after his own camp had lost ground.

Barnier's appointment resolved the identity of the prime minister while leaving that dispute intact. At 73, the former minister and European commissioner offered experience, familiarity to international partners and a reputation for patient negotiation.

Those qualities could help him conduct talks. They could not create a parliamentary majority by themselves. His conservative political family has far fewer deputies than would be required to govern alone.

The contrast with Attal is striking without needing to reduce the story to their ages. Attal had been a central figure in Macron's political project. Barnier has a separate party history and a career extending far beyond it. His usefulness to the president lies partly in that distance.

Yet Barnier cannot simply govern as an independent mediator above the parties. Every appointment and budget decision distributes power or resources among them. Negotiation becomes government only when someone accepts a result they would not have chosen alone.

The left responded to the appointment with a promise to challenge the government through a no-confidence vote. That made National Rally's position decisive from the beginning: if the far right joined a sufficiently broad opposition motion, the new prime minister could be removed despite the president's confidence in him.

The ministers reveal the bargain

The cabinet list announced on 21 September placed Bruno Retailleau at the Interior Ministry and Didier Migaud at Justice. Jean-Noël Barrot became foreign minister, while Sébastien Lecornu remained responsible for the armed forces. Rachida Dati retained culture.

The economic portfolios were divided. Antoine Armand took the economy, finance and industry brief. Laurent Saint-Martin became budget and public accounts minister, attached directly to the prime minister. That arrangement gives Barnier a close institutional connection to the work most likely to determine his government's survival.

The line-up combined figures from Macron's camp with the conservative right. It was not the broad inclusion of the left that the language of national unity might have suggested. Individual backgrounds did not amount to participation by the New Popular Front's parties.

Retailleau's move from the Senate to the Interior Ministry was particularly significant. He represents a conservative current with firm positions on immigration and public order. His appointment gives that current authority over a department whose decisions will attract immediate political attention.

It also creates a potential tension within the cabinet. Ministers drawn from the centre and the right may agree on the need to enforce immigration rules while disagreeing about particular legal changes, rhetoric or relations with the courts. Their shared interest in staying in office does not guarantee agreement on those choices.

At Justice, Migaud brings a different institutional background. The combination of the two appointments means disputes over enforcement, rights and judicial procedure could arise within the government as well as between government and opposition.

The economic division carries its own risks. Armand must speak to businesses and oversee economic policy while Saint-Martin controls the budget brief under Barnier. Cooperation between them will be essential if promises about competitiveness are to fit the revenue and spending decisions being prepared.

A ministerial list can balance political families more easily than it can balance public accounts. The cabinet has been assembled; the policies which will reveal the terms of that assembly are still being worked out.

That is why the sixteen-day interval between the prime minister's appointment and the cabinet announcement should not be dismissed as mere delay. It reflects the difficulty of finding people and portfolios acceptable to a coalition of forces that did not run together on one governing programme.

Le Pen can wait outside

National Rally's initial response differed from the left's promise of immediate opposition. Le Pen said Barnier met at least her criterion of treating different political forces with respect. Her party kept open the option of judging the government by its actions.

That stance costs less than joining a coalition. National Rally can claim influence over decisions without accepting responsibility for every tax increase, spending cut or administrative failure. It can also choose when tolerance no longer serves its political interests.

The mechanism is straightforward. Under Article 49 of the constitution, a motion of censure must obtain the support of an absolute majority of Assembly members. Only votes in favour of the motion count towards that threshold.

A deputy who declines to vote for censure therefore helps the government survive without having to endorse its entire programme. This is the space Barnier is trying to occupy: sufficient tolerance, even where affirmative support is unavailable.

The arrangement is inherently conditional. A party can oppose a particular bill without toppling the government, then later decide that a confidence confrontation is electorally advantageous. Barnier cannot treat a decision to wait in September as a promise to sustain him through the budget.

Nor does National Rally need to agree with the left on a replacement administration in order to vote with it against the incumbent. France's no-confidence mechanism does not require the opposition to elect an alternative prime minister at the same time.

That makes a majority against Barnier easier to imagine than a majority for any one successor. The president's difficulty in appointing him could recur if he falls. But the prospect of renewed uncertainty is a political deterrent, not a legal barrier to his removal.

Macron has limited capacity to threaten another immediate election. Article 12 prevents a fresh dissolution during the year following the July vote. The Assembly is therefore not exposed to the same near-term threat of losing its seats that might otherwise encourage deputies to avoid a confrontation.

The resulting balance gives opposition parties unusual freedom to test the prime minister. Barnier must convince them that a particular agreement is preferable to instability, while making sure the concessions needed to secure tolerance do not drive away his existing supporters.

Le Pen's position is consequently powerful but not cost-free. If voters conclude that National Rally is sustaining policies they dislike, distance from the cabinet may not protect it. If the party forces another crisis, it will have to defend that choice as well.

Six percent changes the conversation

On 25 September, Saint-Martin told lawmakers that the public deficit risked exceeding six percent of GDP in 2024. The previous government's spring estimate had been 5.1 percent. The warning narrowed the room for a comfortable first budget.

France was already in an EU excessive deficit procedure. On 26 July, the Council formally established that its deficit breached the relevant criteria, citing the 2023 figure of 5.5 percent of GDP. The European reference value is three percent.

The procedure does not mean Brussels chooses every French tax or spending line. It does mean that France must present a credible course for its public finances and face scrutiny over whether its plans can deliver it.

The new ministers indicated that spending restraint would come first, with tax increases also under consideration. Barnier had signalled openness to contributions from wealthy individuals and some companies. That puts him close to a disagreement inside the political forces supporting his government.

Macron's economic record has relied heavily on defending tax reductions and a business-friendly investment environment. A new prime minister arguing for additional revenue is therefore negotiating with the legacy of the president who appointed him, as well as with opposition parties.

For the left, selective tax rises may still fall short of its demands for redistribution and public investment. For parts of the right and centre, they may already go too far. Fiscal compromise has no obvious resting point simply because all camps recognise the deficit is large.

Spending cuts create comparable difficulties. A total can look manageable in a statement until it is assigned to a ministry, local authority or social programme. The people affected can then identify a specific loss and the deputies representing them.

Barnier also has to maintain a distinction between a forecast and a final outcome. Saint-Martin's warning describes a risk for the current year, not a completed national accounts result. Budget decisions will nevertheless have to be made before every uncertainty in the data has disappeared.

Article 49.3 offers the government a way to engage its responsibility on a finance or social security financing bill. It is often described as a shortcut around parliament. In these circumstances, it would instead concentrate the parliamentary danger into a potential confidence vote.

If opponents do not gather an absolute majority for censure, the text can be adopted through that mechanism. If they do, the government must resign. The procedure can solve an ordinary voting problem only when the administration has enough tolerance to survive the larger confrontation.

This is where cabinet management and parliamentary survival meet. Barnier needs his ministers to defend a coherent budget, his supporting parties to accept the compromises and enough opponents to conclude that removing him is worse than allowing the text through. The appointment decree secured none of those things in advance.

A negotiator without the old mandate

Barnier's European reputation will ease some introductions. Officials who dealt with him during the Brexit negotiations know his method and the value he places on maintaining a common position. That experience is relevant, but the institutional setting has changed.

As the EU's negotiator, he worked with a mandate backed by member governments and European institutions. At Matignon, building and maintaining a mandate is itself part of the negotiation. There is no unified bloc of 27 governments behind him which he can assume will hold.

France's partners will therefore judge the new government on its capacity to implement commitments, not only on the familiarity of its leader. A credible fiscal plan requires a domestic political route to adoption. Defence and European initiatives require budgets and ministers able to sustain them.

Macron retains the presidency and a substantial diplomatic role. Barnier directs government action and must manage the parliamentary consequences. Their cooperation can reassure partners only if it survives disagreement over the resources needed to deliver their policies.

The cabinet's rightward balance may help on some domestic measures while making broader parliamentary bargains harder. Conversely, concessions to the left over revenue or social spending could disturb the support Barnier has secured on the right. His room to manoeuvre is issue-specific.

As September ends, the government exists and ministries have named political leaders. That is a meaningful change after the summer's uncertainty. It is also a lower threshold than the stable governing settlement the Élysée said it was seeking.

The next decisions will show whether Barnier can turn temporary tolerance into repeated agreement. He does not have to persuade Le Pen or the left to like him. He has to keep enough of them from deciding, at the same moment, that they would gain more from his departure.

The former negotiator has reached the table. This time, several of the people whose consent he needs are sitting outside the government, and they can leave him there alone.