Chicago: A campaign rally of US Republican presidential candidate Donald Trump scheduled for Friday night (local time) in Chicago has been postponed for safety reasons due to widespread protests, a Trump campaign staffer said.

It is not know when or if the rally will be rescheduled. Thousands had gathered to protest Trump's candidacy.

Trump had met with law enforcement representatives prior to the scheduled start of the rally.

Outside the rally at the University of Illinois at Chicago, protesters chanted "Hey, hey. Ho, ho. Donald Trump has got to go."