When Andrew McCabe, former deputy director of the FBI, was fired in disgrace in 2018, it was commonly assumed it was because of the “Russiagate” investigation.

After all, he essentially ran that fiasco, which Special Counsel John Durham definitively noted this week was a baseless farce.

But no. McCabe was fired because he serially lied to investigators that he wasn’t leaking investigative information to the media.

More telling was what he was lying about: an FBI investigation of foreign efforts to influence a presidential campaign.

Not Donald Trump’s campaign. Hillary Clinton’s.

It’s just part of the many ways the FBI went easy on Clinton, as Durham reveals the agency dropped at least four criminal investigations related to her.

The Clinton Foundation was understandably suspected by FBI agents in three d …