I think this is all likely a classic Trump leverage move. The GOP sees that Trump can destroy their party if he wants and if they aren’t nice to him he’ll do it. That’s the stick. The carrot is that if they did treat him well he’ll stay in the GOP and help them. But not if they keep up efforts to help Dems label him a treasonous pariah.
Bingo! Trump is moving pieces on the chess board. Its up to the Republicans