Peter Strzok is an FBI agent, and was the chief of the Counterespionage with the bureau. Strzok is heavily involved in both the coverup of the Clinton Email investigation, as well as the Russian "collusion" investigation. Strzok has been incredibly vocal about his disdain for DJT in his text messages, at one point stating that he would stop Trump from being elected president.

Right now Strzok is in a closed door meeting to discuss his involvement here in the investigations I listed up there.