If I remember right the Koch brothers didn't support trump in 2016 and he still won. It'll be interesting to see what happens in the general election if Trump gets the nomination.
I, for one, am ecstatic that Christie is vowing to stay in through the Convention, DeSantis is being endorsed by Kim Reynolds, and Haley is getting high profile financial commitments. I hope the fight is bitter, ugly, prolonged, and crippling for their electoral prospects. The more time they spend firing arrows at one another, the more we can sit back and shore up support for Congressional Democrats. The Senate map is potential bloodbath, and people aren't going to shut the fuck up about Biden's age, so our best hope is that the GOP gobbles up all the oxygen in the room so the Biden jabs are muffled, and we can build a grassroots tsunami that will take back the House.