Peter Strzok, the former FBI counterintelligence agent who was fired last year over text messages critical of Donald Trump, is suing the government to get his job back.

In a lawsuit filed Tuesday in Washington, Strzok argued his firing last year was prompted by “unrelenting pressure” from President Donald Trump and his political allies. Strzok accused the administration of mounting a campaign to “demonize and fire” him and alleged he was denied an opportunity to challenge his firing, which came within days of a top FBI official recommending a lighter punishment.