What Kind of Voter Supports Mike Bloomberg?

His campaign events draw a ‘socialist at heart’ and an Oklahoma truck driver who says he won’t vote for any other Democrat.

Main Street: WSJ columnist Bill McGurn pretends to be Michael Bloomberg and offers some capitalist advice to his competitors. Image: Rick Bowmer/Associated Press

Bentonville, Ark.

‘Racist Mike, go take a hike! Racist Mike, go take a hike!” There are no more than a couple of dozen (mostly white) protesters outside Michael Bloomberg’s speech here Thursday, some carrying Bernie Sanders paraphernalia. But they chant loudly enough to turn heads inside the noisy event hall.

Mr. Bloomberg and Joe Biden...