Trump went to Congress to try to get all the Republicans behind the AHCA bill. The Freedom Caucus said no. Trump told them they could get "primaried" in 2018.

That would be interesting. A contest between a conservative Freedom Caucus member and what? Somebody more liberal? In that case, wouldn't the Democrat win the general election?

This an interesting three-position contest:

1. Keep ACA
2. Replace ACA with crappy AHCA
3. Repeal ACA and have nothing