And both might be related. Motivation for any billionaire to back Republican top candidates is to repeal all Billionaire Tax legislature that might pass soon.
No such thing will ever happen. This is just political theater for the sake of appeasing the "sour grapes" faction on the left. There is no political will to tax unrealized gains, tax wealth, etc.
Considering we only have 2 political parties in the US, if you oppose the policies of the party in power you only have one other option. I'm a libertarian and don't have a team I root for, but it's a fact that plenty of hyper-wealthy people support the Democrats.