The Rs hold the reigns of power, completely ignoring Trump for the moment, the Rs themselves all ran on repealing O-care, and, now that they run the show, can't manage to do even that.  Things they voted for when they knew the legislation would be vetoed, they can't vote for now, because there are real world consequences to their actions.  There weren't any consequences to a symbolic vote, but there are to a vote that will ultimately become law.