I love Newsom but his time isn't 2020.
Isn't Newsom too economically moderate for you?
He's an economic moderate only by virtue of his own description of himself. In reality he's basically right there on economic issues with the vast majority of California Democrats. The only reason single payer didn't go through at the state level is cuz we're required to balance our budget.
... I'm fairly certain that he wouldn't exactly push any such thing through. He and Brown seem to be building allies economically in the legislature. Nuñez, Brown, Newsom, and Westly are the main four I can think of, but there are quite a few Democrats in California who don't quite like single-payer and other such proposals.