French far-right leader Marine Le Pen denied violating any rules as she and her National Rally party and two dozen others went on trial on Monday, accused of embezzling European Parliament funds, in a case that has the potential to derail her political ambitions.

Marine Le Pen and others are accused of using European funds for unrelated party expenses. The trial, expected to last two months, comes as her National Rally has gained more political sway.

Marine Le Pen, long-time leader of France’s far-right National Rally and presidential hopeful, goes on trial in Paris on Monday accused of misusing European parliamentary funds.