For all my extremism, I don't call for elected officials to resign because of their pasts. Democrats and Republicans alike, they got elected being the persons they are today. If we didn't learn their dark histories, that's a due diligence problem on our part. And if we're dumb enough to elect known dirtbags, we deserve the consequences. As a rule, we should defer to the will of the electorate.
None of these guys should resign. It's up to us to fire them.