Donald Trump is vowing to deport as many as three million people after he's sworn in to the US Presidency in January.
But he says the "wall" that he's vowed to build along the US border with Mexico could, in some places, simply be a "fence".
The President-elect was speaking on the CBS television program "60 Minutes" as protests continued to sweep the US following his upset win.
Our Washington Correspondent Simon Marks reports.
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With 66 days to go before he's inaugurated, it was a weekend of fevered activity at Trump Tower in New York where the President-elect is surrounded by his senior staff and preparing for government.
But there are many questions about just how many of the ideas he voiced full-throated on the campaign trail he will actually implement.
Will he close really America's borders to Muslims?
Will he pull out of climate change accords at the stroke of an Executive pen?
Will he scrap the health-care reforms known as "Obamacare" - on that issue at least he already seems a little wobbly.
But he insists he will REALLY build a wall along America's southern border with Mexico.
Although he conceded to Lesley Stahl of 60 Minutes that perhaps not all of it has to be made of bricks and mortar.
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There was no concession in the interview on the issue of deportations.
Mr. Trump says as many as three million people living illegally in the United States will be thrown out of the country in a process that will begin as soon as he moves into the White House.
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He also indicated another 8 million people - those without criminal records, but still living illegally in the US - remain at risk.
But up on Capitol Hill, one top Republican wasn't singing from Donald Trump's song sheet.
Paul Ryan, the Speaker of the House of Representatives told CNN there are no plans to hire a "deportation force" physically to throw people out.
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Not surprisingly, immigration lawyers across the country say they are overwhelmed with phone calls from anxious clients.
Many schools say minority students have been arriving for class in tears, agonized over their families' futures.
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The protests against the entire notion of a "President Donald Trump" continued all weekend.
Thousands of people have rallied in cities across the country rejecting the outcome of the Election and insisting that, as President, Donald Trump will not speak for them.
Former New York Mayor Rudy Giuliani, perhaps on the verge of heading the Justice Department for Donald Trump, questioned the protests' legitimacy.
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And top Trump officials say Hillary Clinton should make a statement urging her supporters to get off the streets.
But amid reports of a rising tide of threatening behavior towards the country's minority communities, Donald Trump was challenged on "60 Minutes" to send a message to his supporters as well.
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Mr. Trump also made his first two major appointments.
Reince Priebus, the head of the Republican National Committee, will be his White House Chief of Staff…indicating that Mr. Trump isn't entirely rejecting Washington insiders as he suggested he would on the campaign trail.
But he's also appointed Stephen Bannon, head of an ultra-conservative news organization called Breitbart News, his Chief Strategist….suggesting far-right thinking will occupy a central role in White House policymaking.