US President-elect Donald Trump has chosen Republican National Committee Chairman Reince Priebus, the establishment favourite and a low-key party insider, to serve as his White House chief of staff.
The choice of Mr Priebus, a loyal campaign ally to Mr Trump who has close ties with House of Representatives Speaker Paul Ryan, signaled a willingness to work with Mr Ryan and the Republican-led Congress to get his agenda passed.
The chief of staff position, which serves as a gatekeeper and agenda-setter for the president, is typically one of the most important early choices for an incoming president.
Earlier, Mr Trump said he will keep his vow to deport millions of undocumented migrants from the United States, saying as many as three million could be removed after he takes office.
He was speaking in an interview on CBS's 60 Minutes programme to be broadcast today.
"What we are going to do is get the people that are criminal and have criminal records, gang members, drug dealers, where a lot of these people, probably two million, it could be even three million - we are getting them out of our country or we are going to incarcerate," Mr Trump said in an excerpt released ahead of the CBS broadcast.
The billionaire real estate mogul made security at the US-Mexico border a central plank of his controversial presidential campaign, which resulted in last Tuesday's shock election victory against his Democratic rival Hillary Clinton.
However, in the same interview Mr Trump said that certain areas of his promised border wall with Mexico, a key part of his White House campaign platform, could be fence instead.
"There could be some fencing," Mr Trump said in his first prime-time interview since being elected president last week.
"But (for) certain areas, a wall is more appropriate. I'm very good at this, it's called construction," he told CBS.
Meanwhile, demonstrators in major US cities took to the streets for a fifth day today to protest Mr Trump.
Following several nights of unrest, crowds of people marched in parks in New York City and San Francisco, and planned to do so in Oakland, California, according to social media.
A few thousand joined a march at the south end of New York's Central Park, beginning at a Trump property on Columbus Circle and walking toward the property mogul's skyscraper headquarters a short distance away.
They chanted, "Say it loud, say it clear, immigrants are welcomed here," and held signs such as "White silence = violence" and "Don't mourn, organise."
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Trump aiming to emulate Irish tax policy to attract investment
Mr Trump's senior economic advisor has said the President-elect wants to emulate Ireland's industrial success.
Speaking on the Marian Finucane Show on RTÉ1, Stephen Moore said Mr Trump wants the US to compete with Ireland for business investment.
Mr Moore said the Trump administration will seek to bring jobs back from China, Canada, Mexico and Ireland to US states worst hit by the downturn such as Michigan, Ohio and Pennsylvania.
He said the best way to stimulate industry development and the repatriation of multinational enterprises is to reduce business taxes.
Mr Trump has pledged to reduce the rate of corporation tax in the US from 35% to 15%. At present the Irish corporation tax rate is 12.5%.
In this regard, Mr Moore said the businessman turned politician was seeking to emulate Ireland.
However, the Chief Executive of IDA Ireland has played down the prospect of multinational firms leaving Ireland in the wake of Mr Trump's election.
Speaking to RTÉ News yesterday, Martin Shanahan said there are many reasons why US companies invest here, including access to markets and talent and Ireland remains an attractive place to invest.
The Director of Economic and Social Research Institute has also played down the prospect of such firms leaving Ireland.
