Watch out for Tom Steyer. He's been pushing everything from stopping climate change to gun control, hitting the high points all over the Leftist map, and advertising heavily on the tube. To people who haven't been paying attention he almost sounds reasonable. He doesn't sound as much of a shrill Communist as the rest, and that might pull in the moderates.
The rest have all been trying to out do each other sounding more ridiculous than the ones before them.
All are out of touch with the average working guy, at least out here in flyover country, but their appeal is in the urban enclaves.