Kamala Harris is nothing but an opportunist with no real vision.
I actually studied one of Elizabeth Warren's text books in grad school. She actually is a person of substance, whether we like her or her politics.
Joe Bidden is way too old, as is Bernie Sanders.
The democrats are in such disarray now that Trump will beat any of them hands down. The Dems will doom themselves, without Trump having to do anything.
I thought Andrew Cuomo would be a strongest contender against Trump. But I don't think he'll run; too late at this time. The "disgraced" Eliot Spitzer would have been a strong contender too.
I think Eric Swalwell as presidential candidate and Amy Klobuchar as his running mate would likely be the strongest contender -- if America were ready for a female president, which I don't believe we are yet, than I'd say Amy Klobuchar would be the strongest candidate because she's not as leftist and radical as the other candidates; she's true blue blood.
Trump, if her were reelected, would likely be less erratic and he wouldn't be shackled by the ghosts of the 2016 election -- which is way too complicated to describe succinctly; way way too many factors, including the arcane electoral college system, that resulted in a Trump victory.