>http://www.nbcnews.com/politics/2016-election/man-charged-assault-after-punching-protester-trump-event-n536046
>
>At least this time someone got arrested for the assault. At another rally in Iowa, he promised to pay the legal fees of supporters who "knock the crap out" of protesters who may appear at the rally! On average it appears that a person is forcibly removed every 4 minutes from these events.

>> I don't recall any political candidate that's had these type of issues at their events (someone please correct me if I'm wrong).

http://www.history.com/this-day-in-history/protests-at-democratic-national-convention-in-chicago
The "violence" at a Trump rally would not have made the last page of the newspaper in 1968.
Groups were fire-bombing each other outside the convention hall.

Go back even further and the founding fathers settled these arguments by dueling - makes Trump look kind of mild, .