At least three have been arrested so far
Three protesters have been arrested near Phoenix, Arizona just ahead of a Donald Trump campaign rally.
They held banners which read "Trump is Hate" and tied themselves to cars.
They were arrested after police cut them loose.
CNN posted video footage of the barricade the protesters had set up along the campaign's route.
Meanwhile, in Manhattan's, police surrounded protesters outside Trump Towers.
While the gathering was largely peaceful, two people were arrested after some protesters tried to break through a police barricade.
They have arrived at Trump Tower pic.twitter.com/yiTXJB9ieu— Gideon Resnick (@GideonResnick) March 19, 2016