This view of the Constitution has been rejected by the federal courts, which consistently have held that under the Constitution, the states do not have the power to nullify federal laws. The courts have rejected the compact theory, finding that the Constitution was not a contract among the states.
A U.S. Border Patrol agent in San Diego has been arrested for hiding his undocumented father and other people in the U.S. illegally.
The Department of Homeland Security estimated that 11.4 million illegal aliens were living in the United States in 2012 (DHS, March 2013). Pew Research Center estimated that the illegal alien population in 2014 was 11.3 million (Pew, July 2015).