If Trumpcare passes, or if they just repeal O-care, the blame will fall on the Dems.  Trump, the Republican politicians, and the right wing scream machine will all be screaming the same story.  The story they will tell is one where the Democrats destroyed the insurance industry, and that Trump and the Republicans just couldn't fix it in time to prevent a collapse.  It won't matter that their story is a complete lie, their supporters will believe it, and that is all that matters.