I saw Charleton Heston speek there about 20 years ago. The police kept the leftists separated from the attendees, but two leftists got in and disrupted his speech. I think that the left has become more emboldened under 0bama. I think it will get shut down. I hope I am wrong.
They will probably try but CU is trying to avoid the enormous loss of credibility that institutions like UC Berkeley have suffered by allowing all conservative speech to be shut down. They may at least not impose a stand down order on police.