US Republican presidential nominee Donald Trump has signalled a possible shift in his hardline immigration policies, with plans to deport 11 million people who are in the country illegally under review, a senior aide says.
Mr Trump has put his vow to toughen the country's immigration policies at the centre of his campaign.
He has promised to carry out mass deportations and build a wall on the US-Mexico border — proposals that critics have assailed as inhumane and too costly and unrealistic to achieve.
Trailing Democrat Hillary Clinton in opinion polls for the November 8 election and struggling to broaden his support beyond the white working-class voters, Mr Trump has reached out in recent days to black and Hispanic voters.
Mr Trump's new campaign manager, Kellyanne Conway, told CNN Mr Trump was committed to a "fair and humane" approach to those living in the country illegally.
"What he supports is to make sure we enforce the law, we are respectful of those Americans who are looking for well-paying jobs and that we are fair and humane to those who live among us in this country," Ms Conway said.
Pressed on whether Mr Trump's plans would include a "deportation force" the candidate previously pledged to set up, she replied: "To be determined".
Republican Senator Jeff Sessions, a close ally of Mr Trump, told CBS Mr Trump was still working through his plans for deportations should he win the White House.
"He's wrestling with how to do that. People that are here unlawfully, came into the country against our laws, are subject to being removed. That's just plain fact," the Alabama politician said.
Mr Trump has also been rebuked by opponents for his proposal to impose a temporary "total and complete shutdown" of Muslims seeking to enter the country, later rolled back to focus on countries with "a proven history of terrorism".
Mrs Clinton has accused Mr Trump of sowing divisiveness and said she would propose a path to citizenship for some migrants living in the United States illegally.
Campaign shake-up
Ms Conway's comments came after Mr Trump announced last week a major reshuffling of his campaign.
Trump promoted Ms Conway — who had been a senior adviser — to the role of campaign manager and hired Stephen Bannon, head of the Breitbart News website, as campaign chief executive.
Ms Conway — who supported Mr Trump's main rival Ted Cruz during the primary season — said Mr Trump should no longer have to release his income tax returns.
But Mrs Clinton's campaign manager Robby Mook said Mr Trump should disclose his foreign financial ties, after a report showed he owed millions of dollars to the Bank of China.
"Donald Trump talks all the time about a trade war with China. How can he really do that when millions of dollars of his own bottom line can be affected directly by the Chinese Government?" he told ABC America's This Week program.
Mr Trump's support has slumped in national polls in recent weeks and surveys in pivotal states such as Pennsylvania and New Hampshire have shown a widening lead for Mrs Clinton.
Reuters/ABC