Peter Strzok, deputy head of counter-intelligence at the FBI, was a key player in special prosecutor Robert Mueller's probe into possible collusion between the Trump campaign and Russian operatives trying to tilt the election in Trump's favor, the Post said. It quoted people familiar with the issue.
Strzok also worked on the probe into Hillary Clinton's use of a private email server while serving as secretary of state.
During the Clinton investigation, Strzok was having an affair with a senior FBI lawyer named Lisa Page, the Post said.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
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