The default position should be FIRST repeal, with no anticipation beyond that. Any other legislation, whether it stands or falls, needs to come after as a completely separate issue.
This mess is a parallel to the years of wanting “comprehensive immigration reform” without enforcing against illegal immigration.
The correct stance has always been “enforce,” then talk about reform.
In this case, “repeal,” then talk about replace (or not).
Mr. Trump knows this to be true in immigration. He seems to have missed it somehow in the area of health insurance.