French President Emmanuel Macron on Tuesday appointed Defense Minister Sébastien Lecornu as prime minister and instructed him to immediately seek agreement among fractious political parties on the national budget, a key task for Europe’s second-largest economy.

Lecornu, 39, becomes France’s fourth prime minister in less than a year and inherits a volatile political moment after lawmakers toppled his predecessor, François Bayrou, in a confidence vote that exposed deep divisions over public spending and fiscal policy.

Macron told reporters the new prime minister’s work would be guided by the defense of France’s independence and power and by the need for political and institutional stability to preserve national unity. He asked Lecornu to consult with all parliamentary parties first in an effort to secure agreement on the budget before forming a new cabinet — an unusual sequence reflecting the urgency of reaching a cross-party consensus.

Bayrou, 74, had staked his short-lived minority government on an agenda of sharp public spending cuts intended to rein in France’s mounting debt. Lawmakers instead seized on the confidence vote to reject his leadership, creating fresh uncertainty over the passage of a national budget and raising the prospect of prolonged legislative deadlock.

Lecornu was France’s youngest defense minister and was the principal architect of a 413 billion-euro defense spending package for 2024–2030, the largest increase in French military spending in half a century. The plan, outlined amid Russia’s war in Ukraine, is aimed at modernizing the country’s nuclear forces, boosting intelligence capabilities and developing more remotely operated weapons.

A longtime Macron loyalist who joined the president’s centrist movement in 2017 after beginning his career as a conservative, Lecornu has held posts in local government and in the administration of overseas territories. He led Macron’s nationwide “great debate” during the yellow vest protests, a dialogue initiative designed to address mass anger over social and economic inequality. As minister of overseas territories from 2020 to 2022, he engaged in talks over autonomy after unrest in Guadeloupe in 2021.

Macron’s rapid appointment of Lecornu reflects a desire for continuity after a string of short-lived governments and demonstrates the president’s tendency to elevate trusted lieutenants when political storms threaten stability. Still, the new premier faces immediate political obstacles: a divided parliament, urgent fiscal targets, and a public deeply skeptical of austerity measures.

The government’s swift move to name Lecornu comes ahead of mass disruption planned by a protest movement calling itself “Block Everything,” which has prompted authorities to deploy an exceptional 80,000 police officers to maintain order. The protests, scheduled for Wednesday, underscore the domestic tensions that will shape Lecornu’s early days in office.

Beyond budgetary strife, Lecornu will take the helm as France confronts significant international challenges, including wars in Ukraine and Gaza and shifting geopolitical priorities from the United States under President Donald Trump. Analysts say how he navigates ties with allies and manages defense commitments will be watched closely, given his recent role in shaping France’s military posture.

Macron’s instruction that Lecornu consult broadly before forming a cabinet signals the president’s hope that cross-party agreement on spending can be achieved without further destabilizing the government. The new prime minister’s immediate task is to bring parties together on a budget framework that can pass Parliament; only then is he expected to outline his ministerial team and a longer-term governing program.