How can any conservative remain a Republican?
The Electoral College effectively requires that interest groups split into two camps, more left, and more right. Because the Electoral College is “Winner Take All” by State, splitting a State’s votes among more than one right-ish groups ensures defeat. We don’t want 20% Republican, 35% Conservative, and 45% Democrat outcomes in states.
Therefore, each camp has to choose its political vehicle. Currently, that is Democrat and Republican. If a more conservative political vehicle were constructed (a “Conservative Party”), then the leftist Democrats would win the Presidency surely by way of the example above.
So, the proper thing to do is recapture the Republican Party. We can do that with pressure, cash, votes, etc. Just don’t vote, work, or give cash to Republicans that aren’t conservatives.
That’s that consistent answer over years. Reagan recaptured the Republican party for conservatives. We must do it again each generation.