As I always say on FR...
Liberals will form a solid coalition over 80% agreement and conservatives will shred each other over the last 5%.
Look how much bandwidth here is consumed on Catholic vs. Protestant vs Evangelical vs Christian threads.
It might be just 5%, but the usual situation is that we are arguing if we should go 4% left or 1% right. The GOPe never goes right.
And I don't agree that the only choice we have is to go fast left with the D party, or slow left with the R party.