Trump’s endorsement is helpful in drawing attention to a lesser known candidate, and he has been pretty effective at getting these people elected.
In McCarthy’s case, Trump has his reasons for endorsing him. We don’t have to obey. At least for the primary, if there is someone better (and almost anyone in the Bakersfield phonebook would be better) then vote for that guy. For me, I’m not interested in any politician who was silent on the stolen election, or has done nothing to correct the election processes for next time.
Obviously, in November, you vote R when your only alternative is a D. But whoever you vote for, if they can’t admit that 2020 was stolen, don’t expect miracles from the guy.
And that is why we are in such a mess. In many cases, there is little to no difference between a D or an R, and the establishment loves to play that argument to the unthinking, and both sides do it.