You're fighting the battle of the sixties. You will be stuck with 10 more Obamas (no apostrophe,) or worse if you "work from within."
When the enemy controls all venues of power, and each and all violate the constitution regularly with impunity, and there is NO recourse, "work from within" has become a cruel sick joke.
Cruz is working from within. Just primary out the least conservative 50% of Republicans and replace them with people as conservative as Cruz. Why not continue the same strategy that got us Cruz in the first place?
Ultimately I don’t think changing the party label magically changes anything. You have to find the right people. And once you find them, it doesn’t much matter what their label is.
I would also say give no money to the party itself unless and until it’s reformed from within. Only give to outside conservative groups who will fund conservative candidates.