and I don't think having something on the side in a marriage particularly carries over into one's professional life.
What I do think matters is when an adulterer walks away from his "until death" vows time and time again, replacing woman after woman like so much used Kleenex. That does say a lot about his character (and yes, it's usually men in politics although women in films do the same thing) and about how he views half the citizens in the country he wants to legislate, adjudicate or run as an executive.
I don't trust serial polygamists any farther than I can throw a grand piano, in other words.
Capitalism is the extraordinary belief that the nastiest of men for the nastiest of motives will somehow work for the benefit of all. - John Maynard Keynes