If things stay as they are now, I'm leaning toward Sanders too. But if Biden implodes before then the picture could be a lot different. I have no regrets in voting for the lazy, dimwitted 0bama over the megalomaniac Clinton. No offense but you people who think that was a mistake have no idea what havoc Clinton would have wrought with a filibuster-proof Congress.
I don't even see a Sanders victory as being that bad. It would crush the economy, keeping the dems so busy with damage control that they wouldn't get much else done, and result in a massive backlash in 2022, then quite possibly another impeachment now that the bar is height is measured in Planck lengths. Sanders isn't a democrat and wouldn't command much loyalty from Congressional dems so whomever he picks for VP will be preferable to them.