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,

Good morning. Marine Le Pen’s party pledges to topple the French government. How a billionaire’s “baby project” ensnared dozens of women. And the white sands and azure waters of St. Tropez are a luxury hotel brand’s next target.

Marine Le Pen, National Rally (RN) leader, has threatened to bring down the French government on Monday if Michel Barnier, France’s prime minister, does not drop effective cuts to pensions.