Dozens of protesters blocked traffic near a Donald Trump event in Arizona on Saturday, while demonstrators marched in New York City to protest the GOP front-runner.
Protests at Trump rallies increasingly have become more contentious in recent days.
Friday night, protesters outside a Trump rally in Salt Lake City, Utah, tried to breach the venue's doors, causing police officers and Secret Service officers to abruptly shut them as Trump was speaking.
And last week, scuffles between protesters and supporters in Chicago led Trump to cancel a rally there.