Even Bernie Sanders is not liberal enough for the Democratic left

The annual Netroots Nation conference of leftist Democrats spiraled out of control on Saturday as a group of black activists stormed the stage and took over the event while startled presidential candidates looked on.
Former Maryland governor Martin O’Malley and Vermont Sen. Bernie Sanders, who are both courting the party’s left wing in their presidential bids, were heckled by the protesters and shouted down when they tried to respond.

According to CNN, O'Malley was answering questions on stage at the Phoenix conference when dozens of “boisterous” conference attendees flooded through a side door and disrupted the candidate’s remarks.

Tia Oso of the Black Alliance for Just Immigration, who represented the demonstrators, climbed onto the stage, secured a microphone, and delivered a speech while O'Malley looked on.
Among the comments directed at O’Malley, former Baltimore mayor, by the protesters who squeezed together in front of the stage was: "If I die in police in custody, burn everything down! That's the only way mother******* like you listen!"

When Sanders approached the stage a moment later, the demonstrators continued with their "Black Lives Matter" chants. CNN reported that the candidate, a favorite of Netroots Nation, threatened to leave if they continued to interrupt him.

"Black lives, of course, matter. I spent 50 years of my life fighting for civil rights and for dignity," the candidate said. "But if you don't want me to be here, that's OK. I don't want to out-scream people."
Sanders proceeded to deliver his usual presidential stump speech over sporadic shouting from below. After talking over one another, according to CNN, Sanders eventually ditched pre-planned remarks and tried to address questions from demonstrators.