Assuming this would be allowed“
Allowed by whom? Your second point is what l was thinking. The GOPe is a bunch of never Trumper a-holes. Wouldn’t switching to caucuses put the decision with same base hating bastards who gave us Ronna as party head?
That's not how a caucus works. Any and all grassroots Republicans can attend the caucus, and the results would be binding on the state party. Someone from Iowa please chime in here.