Trump protesters in O.C.

Donald Trump protesters burn tires to create smoke and incite people at the intersection of Fair Drive and Fairview Road near the Orange County Fairgrounds on Thursday in Costa Mesa.

Protests erupted along the street surrounding the Orange County Fairgrounds where Donald Trump, the front-runner for the Republican presidential nomination, held a rally Thursday.

A Donald Trump supporter, right, yells at a Trump protester at a rally in Costa Mesa.

Milagros Vizcaino, 13, of Los Angeles heads home after participating in a May Day march in downtown Los Angeles on Saturday for immigrants’ rights to protest tough new immigration law in Arizona.

Thousands of protesters converged on City Hall in downtown Los Angeles on March 25, 2006. They were protesting the House-passed HR 4437, an anti-immigration bill that opponents said would criminalize millions of immigrant families and anyone who comes into contact with them.

Students from Belmont High wave flags and yell from the steps of City Hall in 1996 after they walked out of school and marched through downtown Los Angeles to protest Proposition 187.

Students from various Oxnard high schools skip classes in 1996 and gather in Plaza Park in Oxnard to protest Proposition 187.