Jorge Mena, a graduate student at the University of Illinois who authored a petition to cancel tonight's Donald Trump event, talks with Rachel Maddow about objections in advance of the Trump event that led to widespread protests and violence when the event was cancelled at the last minute.March 12, 2016
UP NEXT
Violent, terroristic racists are a recurrent problem with no simple solution
06:26
Reporters tread carefully with attention-seeking racists, extremist online communities
06:03
Site of Buffalo shooting a community hub with deep roots
02:44
Idaho Republicans reckon with extremism in political spectacle primary
04:13
Add MSNBC Prime to your DVR recording schedule
00:52
GOP fields candidates of questionable character as attacks on abortion rights intensify