Marine Le Pen’s ultimatum to French Prime Minister Michel Barnier, even after he caved on a key demand from her party, lays bare the unprecedented clout the far-right leader now wields in Paris’ halls of power.

Le Pen has given Barnier until Monday to yield to budget demands from the National Rally (RN) or face the threat that they would back a likely no confidence motion against his government, which would trigger its collapse.

Far-right leader holds prime minister’s future in her hands as eurozone’s second biggest economy hurtles toward political and financial uncertainty.