As as US citizen who lives in Philadelphia, I can say that there would probably be riots across the country. This is actually something that I brought up amoungst friends in the past and people looked at me like I was a racist twit. But I really do fear the hate mongers that we are very strong here would do something to him. :(
I still voted for him in the Pa Primary because I do think he is the smartest and most capable to run our country and we need a change but I still worry about him every day on the campaign trail...especially when he's in the South or Midwest.