They've already stopped enforcement of the mandate and everything they're doing is to kill ACA.
Here is the shrewd calculation they're making. Introduce unrealistic bills that either die in the house or rejected with no votes from Democrats in the senate. While all this fukk shyt is happening, this causes insurers who need to adjust rates soon for the upcoming enrollment season in the fall to be weary so they will either rise prices due to the uncertainty of the environment and/or even more insurers bail from the market place or refuse to participate.
Republicans can give a shyt about care. With this in mind, this is a win win scenario from their perspective.
Either pass an unpassable bill in the house, fails in the senate, ACA effectively dies due to removing mechanisms that support it and then say "HA Told you that ACA was an awful plan! look at it!"
Or it fails in the house, ACA still dies due to the previous mentioned removing of supporting mechanisms and they say "HA told you that ACA was an awful plan! Look at it!"
There was a time I was naive and would believe the voting public was rational actors. But now I realize that they have the attention and memory of a gnat and with the right propaganda, the above tactics will be bought hook,line, and sinker by a large segment of the voting population. Especially their base.