If I were a wealthy Republican who wanted Trump gone, I wouldn't be funding other candidates at this stage. One way or another, Trump won't be able to proceed with his campaign past early to mid 2024, and that's the time I'd be spending up large. As far as wealthy GOP donors go, don't forget the deep-pocketed Kochs. They've made it clear they don't want Trump, but they won't support other candidates until Trump is washed up.