The proclaimed war of Bernie’s supporters against the Democratic Party “Establishment” is strategically misguided. It may feel like the right thing to do, but it’s akin to shooting yourself in the foot. Come fall, if Bernie wins the nomination, he will need the help of the party’s “establishment,” party regulars, and party leaders, like the Obamas, in states like PA, OH, MI, WI, IA, Fl, AZ, and NC, not to mention across the country.

By the same token, the moderate wing of the party has a similar duty to suspend unprincipled attacks on Bernie and minimize divisions. A united party will set the stage for winning the White House and Senate this fall, while a badly fractured Democratic Party will erase that possibility.