Election security

Demoted FBI agent Peter Strzok had larger role in Clinton, Russia probes than previously known

Peter Strzok, who was pulled off Special Counsel Robert Mueller's investigative team last year, played a more central role than previously known in both the Russia and Hillary Clinton email probes, a lawmaker familiar with the matter told Fox News Tuesday.

The lawmaker's assessment of Strzok's role in both investigations was based on the most recent records and testimony, including a closed-door interview with FBI espionage chief Bill Priestap.

Priestap was interviewed Tuesday as part of an ongoing joint investigation by the House Judiciary and Oversight committees. Priestap was Strzok's supervisor and oversaw both the Russia and Clinton investigations.

The lawmaker described Priestap as a very cooperative witness, but added that unanswered questions remained about Priestap's overseas travel. One line of questioning Tuesday concerned a trip to London by Priestap in May 2016 and whether it was connected to the Russia case.