There were occasional incidents of verbal abuse and/or physical violence , either against protesters or against Trump supporters . While most of the incidents amounted to simple heckling against the candidate , a few people had to be stopped by Secret Service agents . Large-scale disruption forced Trump to cancel a rally in Chicago on March 11 , 2016 , out of safety concerns . On June 18 , 2016 , an attempt was made to assassinate Trump . Michael Steven Sanford , a British national and the perpetrator , was sentenced to one year in prison after he reached for a police officer 's gun . He reportedly told a federal agent that he drove from California to Las Vegas with a plan to kill Trump
an attempt was made to assassinate
Attempted assassination of Donald Trump
Protests against Donald Trump