France's minority government is on the brink of collapse after Prime Minister Michel Barnier used special powers to force through his budget without a vote in parliament. Furious opposition parties said they would back a no-confidence motion to oust the former Brexit negotiator in a vote that could take place as early as Wednesday.

PARIS—Anti-immigrant leader Marine Le Pen is engaged in a high-stakes game of chicken with the French government and a multitude of global investors who finance the country’s sizable debt load.For weeks,