The devil is in the details. Sure, I support the idea of single payer or universal healthcare coverage. Recall the mess made when the administration botched the roll out of health care exchanges. The scandal was one of the major contributors to Republican wins in the 2014 elections. Of course they helped make that mess but the egg was on Democratic leadership faces and the Democratic party was tarred for that mess. As a result the 24 million people who should be planning for better things are now at risk of losing health care coverage. The details matter.
So, yeah, California, get the ball rolling, get the debate moving and follow up with a solid, responsible, well thought out plan. it would be a bad joke on everybody who supports this idea if Democrats passed a 400 billion dollar health care bill without a thought of how to pay for it. That sounds more like something Republicans would do. Of course, their MO is always to remove billions from public spending without a thought of what the results would be. I guess it's easier to thoughtlessly remove funding than to thoughtfully redirect spending to a better healthcare system.