My takes:
Based on what trump said, it sure sounds like he may run with Candace
If the democrats wreck our country bad enough for widespread redpilling to happen, then Trump has a legitimate shot and should absolutely be voted in the primaries. If somehow the democrats maintain their whole voter base, it may be way tighter final run, and the never-trumpers in the party and the democrats with their passionate hate of trump may hand another term to Kamala. At that point, it may be worth voting for someone else in the primaries, even though it would be amazing if trump could get a second term. I doubt that someone else could be primaried, though, because Trump is still super popular inside the party.