That would draw back a lot of the equestrian class Rethugs and indies who are repelled by the christofashie white nationalist stench, and I think would have little effect on the Trump base of those death cultists. They are Trump or Die types.
Marco Rubio would be another, and he would hurt us with an already problematic Latino vote, plus draw back some of those sort of moderate equestrian class Rethugs and indies I mentioned above. His being a Senator from a not 100% deep Red state (but trending that way) might hurt his chances.
JD Vance could be on that list as well, but he is also a Senator. Granted OH is pretty deep Red, and unfortunately Sherrod Brown is by no means a shoe-in for re-election, nor is Tester from MT, and, to a lesser degree of peril, Baldwin, Casey, Rosen, and whoever wins the MD (Hogan changing his mind and running, arfff) and MI (all of our best potential candidates declined to run, for various reasons) Dem primaries.
I would add Tim Scott to the list, but I just cannot see Trump or some of his worst parts of his racist base going for a black man. Then again, many will accept pretty much anything Trump does, so who knows?
Atm, I cannot see a female candidate (no way Haley will be picked, I just cannot see that happening) out there who would expand the Trump vote (as that is what we are discussing). All the ones in the running are RW MAGAts.