Trump calls off Chicago university rally amid security fears

Republican presidential candidate Donald Trump has cancelled one of his signature rallies over safety concerns after protesters swarmed into the arena where he was due to speak.

The announcement that the brash billionaire businessman would postpone the rally led a large portion of the crowd inside the University of Illinois at Chicago Pavilion to break out into raucous cheers. Many rushed on to the floor, jumping up and down with their arms up in the air.