66% want to keep the law in some form, yet 46% voted for Trump and about 50% voted for GOP members of Congress. Both Trump and the Republican politicians have been vocal advocates of repealing the law. So there's a large percentage of Americans who're dumb enough to vote for the candidates of repeal, despite not wanting the law repealed. Amazing, yet unsurprising.
They are not dumb. Did Clinton ever said "Vote for me, to save Obamacare"? No.
Democrats will start winning elections when they actually start standing about ideas.