Barr is particularly concerned that politics may have influenced several high-profile investigations.

Barr was flabbergasted, associates said, at news reports that Peter Strzok, a top FBI agent, and Lisa Page, an FBI lawyer, had exchanged private text messages critical of Trump in 2016 even as they investigated Hillary Clinton’s use of a private email server while she was secretary of State.

https://www.latimes.com/politics/la-na-pol-william-barr-attorney-general-justice-department-20190315-story.html