Diversity Panic Hits the Democratic Field

Who’s at fault if black voters support white candidates?

Stop me if you’ve heard this one before. An Asian guy, two black guys, three white women (one of whom spent much of her life claiming to be Native American), a Pacific Islander woman, a gay guy, a Hispanic guy, two elderly Caucasian Jews (one a billionaire, the other a socialist), a self-styled Irishman, and a few nondescript white guys walk into a bar, and the bartender yells, “Get the hell out! We value diversity here!”

I didn’t say it was...