US President-elect Donald Trump has said he will deport or jail up to three million illegal migrants initially.
Those targeted would be migrants with criminal records, such as gang members and drug dealers, he told US broadcaster CBS in an interview.
He also confirmed that another election promise, to build a wall with Mexico, still stood but could include fencing.
The Republican defeated Democrat Hillary Clinton in Tuesday’s presidential vote.
His victory shocked many who had expected Mrs Clinton to win following favourable opinion polls.
Mr Trump is due to take over at the White House on 20 January, when Barack Obama steps down after two terms in office.
Both houses of Congress are also under Republican control.