The Democratic Establishment Is Broken

LAS VEGAS—The phrase Democratic establishment conjures images of something like the Illuminati with the power to determine the outcome of American elections. But so far, the supposedly all-powerful leaders of the party have been about as well organized as The Muppet Show.

Now, with Senator Bernie Sanders’s massive win in Nevada, he’s taken the lead in delegates and may never lose it. Efforts to stop him so far have been ineffective and made the party seem out of touch. This summer, party leaders may be forced to accept the nomination...