Immigration was a top issue in his campaign, and President-elect Donald Trump's promises are about to be put to the test. A look at immigrants in the U.S. by the numbers:
Immigrants in U.S. illegally: about 11 million.
Criminal immigrants: As of 2012, government estimated 1.9 million immigrants were convicted criminals and could face deportation.
Criminal immigrants in U.S. illegally: Migration Policy Institute in Washington estimates about 820,000 of the criminal immigrants came illegally.
Deportations under President Barack Obama: More than 2.5 million.
Deportation costs: Average cost of each deportation is about $12,500, according to a 2011 government estimate.
Immigration court backlog: More than 521,000 cases pending in federal immigration court, according to Transactional Records Access Clearinghouse at Syracuse University.
Immigrants ordered deported: 88,128 in 2015, according to Executive Office for Immigration Review at Justice Department.
Young immigrants protected from deportation by Obama administration: More than 741,000 approved for deferred action, which shields them from deportation and authorizes them to legally work.
Border fence: About 650 miles of fencing already in place along U.S. border with Mexico, in parts of Texas, New Mexico, Arizona and California.
Length of U.S.-Mexico border: Roughly 2,000 miles.
Border Patrol agents: 18,321 agents patrol U.S. border with Mexico.
Arrests at border: 408,870 people were arrested trying to cross border illegally during 2016 budget year that ended Sept. 30.
This story has been corrected to indicate that the 88,128 figure reflects immigrants ordered deported in 2015, not immigrants with pending deportation orders. With BC-LT--Trump-Mexico.