I have been asking the same question. If she gives it back without a fight, won't she be admitting that she knew it was wrong?
I am not familar with the details of this case but politicians return campaign contributions all the time without major consequence. It seems to me there are only two reasons why "The Beast" wouldn't do it here; 1) she thinks it's clean money, or 2) it's the tip of an iceburg that would sink HILPAC or whatever slush fund she's running these days.