I know some couples that permit polyamory in their relationship.  And the idea of thinking about politician sex lives makes me ill - if it's consensual it's not any of our business.  

Neither the Clintons nor Trump have fidelity in their history, and I don't support either of them.

Bush I had a mistress in the White House, but the media declined to stress that.  Who cares - war crimes were far more important, but those were not stressed, either.