Peter Strzok, the former FBI agent who was fired for anti-Trump bias after helping kick-start the Russian collusion investigation, is suing the government over his firing.

In a lawsuit filed Tuesday, Strzok claims the Department of Justice and the FBI mishandled his dismissal and caved to pressure from President Trump. The former agent alleges that his firing “was the result of unrelenting pressure from President Trump and his political allies in Congress and the media,” accusing the government agencies of violating his First and Fifth Amendment rights by leaking his text messages with FBI lawyer Lisa Page.