Sorry, Never Trump in 2015 was very likely a Jeb supporter.
That seat is a key placeholder, and while there has been legislation that did not get through because she was not on board, she's been an essential and critical vote in getting some legislation through and nominations that would have never gotten through if a Democrat held the seat...and in 2020 that seat was one of the most vulnerable. The legislative filibuster may be gone with Democrats ramming through even more garbage at high speed if that seat had been lost in 2020 - Manchin and Sinema would not have been able to block the change if only 1 more seat was on the side of elimination as Harris would have provided the tie breaking vote.
That is plausible, but he would have donated to someone.
Heck, I gave to Cruz when he announced, then later to Trump when it became apparent he was more adept on the debate stage, and had shown he actually understood the problems and generally how to approach them.
Of course, Paul Ryan and Mitch made sure their own stated efforts, protecting the border, reducing government spending, and rolling back 0bamacare and other Democrat programs, were never done, because Trump saying he wanted those, too, meant they would now have no more excuses to not do what they had always said they wanted (and had gotten elected for), exposing them as long-term liars.
RINOs hate him to this day.