They think they don't deserve any better so they take whatever is dished out. I know there are individuals like that. They believe no one else will want them and they don't want to be alone so they grovel and subject themselves to being treated like trash. I never thought that an entire political party could be like that. But you see what has happened to the once-proud Republican party. Never in a million years would I have foreseen this turn of events.
Not always true.
I know many females who are/were in abusive relationships. The majority of them stayed because "I can change him". And all he has to do, is tell them he's sorry and "it will never happen again" and they will forgive anything he does. They know they are being abused, but honestly believe they will eventually change the behavior by tolerating it.