RIP Medicare 4 All then. Polling seems to suggest that Medicare 4 All is not popular at all when it is described as single player/killing private health insurance. There could be new polling I haven't seen though.
Eh. Polling I've read seems to make negative reactions appear from pretty obvious push polling to get negative opinions. Even so, I'm not worried. 2 years ago, Hillary Clinton said "Medicare For All will never ever happen." And this year, every candidate is asked about it and we've had a bunch of front runners sign onto Bernie's single payer plan.
We've made big progress. We'll make more. We're winning.