Police form a line to contain protesters outside a campaign rally for Republican presidential candidate Donald Trump on Thursday, June 2, 2016, in San Jose, Calif. A group of protesters attacked Trump supporters who were leaving the presidential candidate’s rally in San Jose on Thursday night. A dozen or more people were punched, at least one person was pelted with an egg and Trump hats grabbed from supporters were set on fire on the ground. (AP Photo/Noah Berger)