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.
Their first aim is to send part of their earnings back home to their family and their second goal is to bring more family members to the United States. Eventually they hope to gain permanent residency (green card) and possibly U.S. citizenship status. Other illegal immigrants come with a different purpose.