As CNN notes, there is no strict legal definition of a "sanctuary city," a term that advocates for mass immigration dislike for its revealing nature. The movement began thanks to American churches in the 1980s who welcomed illegal aliens from Central America purportedly fleeing violence from the Third World, much as they do today. Now, more than 200 state and local jurisdictions defy federal immigration law by refusing to detain illegal aliens who are usually caught in the commission of another crime for deportation.

"Conservatives say we believe in the rule of law, and the beginning of the rule of law is enforcing the law. Since 1986, there was a promise we would enforce the law on border security. We've done squat. We've done nothing… Eleven million people have crossed over illegally," Paul said on the Laura Ingraham show on Tuesday. "So, the first thing we have to do is enforce the law." He added: