This tired old comment line does nothing to advance the discussion.  NUMEROUS sources have pointed out that the largest factor threatening the ACA is uncertainty about whether the current administration will continue subsidies to lower income americans.  The second major issue is the potential loss of the individual mandate, which brings healthier individuals into the insurance market.  Notice that both of these destabilizers are the result of uncertainty about what the current administration proposes to do.  So, in answer to your post, IF there was a real interest in ensuring quality healthcare vs "winning" the partisan posturing contest, both sides would step back from their posturing and take measures to stabilize the market.  THEN, they could work together to tweak and repair other parts of the existing law that have not worked out as expected (e.g. optional medicaid expansion leaving thousands of people in limbo).  

Think about it...the ACA doesn't need to be replaced, just fixed