“This is Chicago, protesters are an industry,” Rubio said on Fox News late Friday. “It is clear, just from watching some of these images, that this was an organized effort, an orchestrated effort, from groups that wanted to disrupt this event, and Chicago is a hub for that sort of activity.”
But Rubio added that Trump “bears some responsibility for the general tone” at his rallies.
“He most certainly … has in the past used some pretty rough language, saying, ’In the good old days we used to beat these people up,’ or ‘I’ll pay your legal bills if you rough them up,’ ” he added.
In a separate news conference on Friday, the Florida senator was even harsher toward Trump, saying the businessman “clearly has used language that appeals to anger.”
“I would point out there isn’t violence at my events,” Rubio said, adding that the same can be said of rivals Ted CruzRafael (Ted) Edward CruzFiorina: Biden picking Harris for VP 'a smart choice' Russian news agency pushed video of Portland protestors burning a Bible: report After trillions in tax cuts for the rich, Republicans refuse to help struggling Americans MORE and John Kasich, as well as Democratic presidential candidates Hillary ClintonHillary Diane Rodham ClintonUSPS warns Pennsylvania mail-in ballots may not be delivered in time to be counted Senate leaves until September without coronavirus relief deal Gloria Steinem: Selection of Kamala Harris recognizes that 'black women ... are the heart and soul of the Democratic Party' MORE and Bernie SandersBernie SandersChris Wallace: Trump struggling with attacks on 'shape-shifter' Harris Kamala Harris: The outreach Latinos need Biden and Harris seen as more moderate than Trump and Pence: poll MORE.
“There’s only one presidential candidate who has violence at their events,” he concluded. 
“And I do think Donald needs to realize and take responsibility for the fact that some of the rhetoric he has used can potentially be contributing to this environment.”
Trump’s Chicago rally Friday night was called off amid massive protests.
The businessman’s supporters and protesters clashed into the night on the streets. 
Trump slammed the protesters in an MSNBC interview late Friday night.
"It's a little bit sad when you can't have a rally in a major city in this country,” he said. “What ever happened to freedom of speech? What ever happened to the right to get together?"