Most of Peter Strzok professional career has been spent working for the FBI. His primary mistake was sending text message to Lisa Page, Special Counsel to the FBI using a cell phone issued by the FBI. Their phone messages were discovered, and Peter Strzok was taken off the Mueller investigation. There were about 7,000 text messages between Page and Strzok and a small fraction of these emails had disparaging comments about Trump.
The Inspector General made a thorough investigation of the Hillary email scandal, and found no bias on the part of Peter Strzok. Of course Strzok and Page were trying to keep their affair a secret. The comments were meant to be part of a very private conversation. With the release of the text messages, it has become the most public affair ever, and great fodder for Fox News.
Unfortunately, Strzok’s days at the FBI are probably numbered. He is likely an excellent FBI investigator, and did nothing wrong in both the email scandal and the Russian probe. But, the obvious political heat makes him a hot potato.
He is scheduled to testify on Wednesday in a closed session of the House Intelligence Committee, whose chairman Devin Nunes has been in lockstep with Trump. This committee likely leaked all of Strzok’s text messages before the DOJ decided to release them.