Donald Trump on Saturday denounced the protests that led him to cancel a scheduled rally the previous night in Chicago, calling them "a planned attack" that was "professionally done" and blaming Bernie Sanders supporters for inciting violence. Sanders, however, pushed back against Trump, calling on him to denounce violence at his rallies and labeling him a "pathological liar." The accusations come on a day when Trump refused to apologize for his rhetoric at his rallies, one of which was interrupted when a man tried to rush the stage. Secret Service officers protected the GOP front-runner, who was unharmed. Trump focused on Sanders in his comments about the protesters Friday night. "Some represented Bernie, our communist friend," Trump said in Dayton, Ohio, his first campaign appearance since the Chicago event was postponed. Read more http://www.cnn.com/2016/03/12/politics/donald-trump-protests/index.html