MoveOn.org is a progressive organization supporting Democratic candidates at all levels. Recently, they conducted a straw poll among their member to see who they currently support for the 2020 presidential nomination.
The biggest surprise was Beto O'Rourke finishing first among all the candidates with the support of 15.6% of the members voting. Joe Biden was second with 14.9%, Bernie Sanders was third with 13.1%, and Kamala Harris was fourth with 10%. All other candidates finished in single-digits, including Elizabeth Warren at 6.4%, and everyone else with less than 3%. About 28.8% were undecided.
It should be noted that this is just a straw poll of MoveOn members -- not a scientific poll of all Democrats. But MoveOn members have demonstrated they are likely to be donors to Democratic campaigns, and many of them are among the party's workers (block walkers, phone callers, envelope stuffers, etc.). They should not be ignored.
It looks like the O'Rourke candidacy could happen, and would be a formidable force in the primaries and caucuses.