The U.S. Justice Department filed criminal charges against former FBI Director James Comey on Thursday, in a dramatic escalation of President Donald Trump¡¯s retribution campaign against his political enemies.

If convicted, Comey could face up to five years in prison. He faces charges of making false statements and obstructing a congressional investigation.

Comey, in a video posted on Instagram, said: "My heart is broken for the Department of Justice, but I have great confidence in the federal judicial system, and I¡¯m innocent. So, let¡¯s have a trial and keep the faith."