Well, she's not proposed a bill, and not supported Sanders' Medicare for All bill which is the current leading proposal for universal health care in the US. And - she gaslights about it, see:
To explain why I claim she's gaslighting, note that universal health care in Capitalist societies has basically two options:
1. Government insurance, non-governmental provision
2. No insurance, government provision
US Medicare is option (1.), US veterans' healthcare as well as UK national health service is option (2.) and is quite viable. Option (3.) is only for non-Capitalist economies. In the clip, Feinstein gaslights by pretending Medicare for All is (2.) rather than (1.) and declaring opposition to (2.)
Finally, several days later, health insurance industry lobbyists organized a fundraiser for Feinstein, as mentioned here:
