"Get used to me slaying": The Journal of Alexandria Ocasio-Cortez—Drink water and don't be racist

But Mr. Sanders’s highest-profile surrogate, Representative Alexandria Ocasio-Cortez of New York, said she understood Ms. Warren’s hesitation, and suggested it was a teachable moment for the left.

“I always want to see us come together as a progressive wing,” Ms. Ocasio-Cortez said. “I think that’s important and where we draw strength from. But at the same time, I come from the lens of an organizer, and if someone doesn’t do what you want, you don’t blame them — you ask why. And you don’t demand that answer of that person — you reflect. And that reflection is where you can grow.”