Al Franken
Not sure what the cutoff is for "past conduct that requires resignation" but Senate Democrats have all (afaik) condemned the behavior. Nonetheless, we will hear both-sides and false equivalencies between attempted rape of teenage girls, pussy-grabbing* and what Franken's accused of. Nonetheless, Franken might have to go.
We'll also see that personal conduct around these things is very important, but GOP opposition to laws that make sexual harassment, assault and rape harder to get away with is just a difference of opinion.
*Actually, they'd prefer just not to talk about that at all