Top US immigration official responds to Chicago mayor calling him 'barbaric' El Centro sector U.S. Border Patrol Chief Greg Bovino discusses anti-I.C.E. agitators and immigration enforcement operations on 'Fox News @ Night.' NEW You can now listen to Fox News articles! President Joe Biden 's decision to allow the free flow of illegal immigration into our country has resulted in 20 million illegal immigrants living in the United States. We knew nothing about these people. We didn’t know where