>If there are enough candidates in the race, they divide the vote between them and somebody who can exploit the divisions comes out on top, even a White guy (Garcetti in LA, de Blasio in NYC, Emanuel in Chi).
A white male, Jewish candidate has no chance with the Dem base. Their identity groups hate all three of those attributes. That’s the reason Bernie lost despite running against the wildly unpopular Hillary Clinton.
See Eric Garcetti in LA, who manages to be Italian, Mexican, and Jewish at the same time.