By defunding and deriding them. Only donate directly to candidates you like.
That in itself is not the answer either. It has been reported that as long as they identify with the GOP, they have to send a certain amount of the money they receive to the Party. Then the Party gets to divvy it out as they see fit.
Just look to Alan West’s last run. He may as well have done better without them because he received squat. Just look how the GOP dominated Florida House gave the Democrats everything they wanted in the redistricting, including getting rid of the safe “white” district he was proud to represent.
STARVE THE BEAST. DEFUND THE GOP!