Bernie SandersBernie SandersSunday shows preview: Both sides gear up for debate UK's Corbyn calls for unity after reelection as Labour Party head Green group endorses in key Senate races MORE shot back at Donald TrumpDonald TrumpPence offers Cruz 'heartfelt thanks' for Trump endorsement Trump: We are proud of African-American history museum Kim Kardashian confirms: 'I stand with Hillary' MORE on Saturday after the Republican front-runner blamed him for the violence that broke out at a planned campaign rally in Chicago on Friday night.
"So the issue now is Donald Trump has got to be loud and clear and tell his supporters that violence at rallies is not what America is about and to end it," Sanders said.
Trump was forced to cancel a rally in Chicago on Friday night when massive demonstrations caused violent scuffles between his supporters and protesters.
The real estate mogul has refused to take responsibility for the increasingly frequent violence that has taken place at his rallies.
At a campaign stop on Saturday, he said that his supporters at the Chicago rally "caused no problem."
"They were taunted, they were harassed by these other people — by the way, some represented Bernie, our communist friend," Trump said.