Sanders tells supporters to cool it — but they don’t always listen

Campaign officials have been pressing surrogates and other allies not to escalate combustible disputes that have recently become more personal, according to people with knowledge of the situation, including a tense fight with Joe Biden, a separate altercation with Sen. Elizabeth Warren (D-Mass.) and a renewed schism with Hillary Clinton.

Sanders issued a rare apology this week to Biden after a prominent supporter wrote an op-ed declaring that the former vice president has a “big corruption problem.” And after Clinton slammed Sanders, he sidestepped her comments instead of rebuking her.

But many Sanders supporters, and even some campaign aides, are inclined to take a more aggressive approach that they say will highlight important differences. DeMoro said that Biden has a “character issue,” and she sarcastically thanked Clinton for drawing “a lot of neutral people” to Sanders with her attacks.