George Bush Sr. made a deal with Democrats to raise taxes and cut spending. Ever since then the Republican strategy has been to oppose pretty much anything a Democratic President proposes. The ACA was a Republican healthcare idea and they didn’t support it because a Democrat proposed it.

There are only two realistic possibilities. Get a Republican to propose some sort of national healthcare or have Democrats fully embrace socialized medicine and not give a shit what Republicans say or think. If it gets implemented quickly enough then getting rid of it will be very difficult to do. People won’t give up free at the point of usage healthcare once they try it out.