A US judge temporarily blocks Donald Trump's order to change birthright citizenship, which was slated to take effect in February
The judge calls the order "blatantly unconstitutional" - the president says he will appeal the decision
Meanwhile, Trump orders the declassification of files relating to the deaths of John F Kennedy, Robert Kennedy and Martin Luther King Jr
The president also pardons 23 anti-abortion activists as he signs another flurry of executive orders in the Oval Office
Speaking at the World Economic Forum in Davos, Trump threatens tariffs worth "trillions of dollars" if the rest of the world does not make its products in the US
To gasps in the hall, he says Canada could avoid tariffs if it chooses to "become a state" of the US
Trump: Canada could 'become a state' of the US to avoid tariffs
Trump says there have been skyrocketing investments in the US as a result of his election win.
He references the $500bn of investments made to develop Artificial Intelligence in the US. He also mentions news reports that Saudi Arabia will invest billions in his country.
Trump asks the Crown Prince, Mohammed bin Salman, to round that up to a trillion dollars.
Trump warns that if companies don't make their products in America, they'll face tariffs.
If they do bring manufacturing to the US, Trump promises "big" tax cuts.
He says there will be "nowhere on Earth" better to manufacture.
Domestically, he says he will pass the largest tax cut in American history, which will be even lower than tax cuts from his first term as president.
Trump then speeds through his campaign promises and what he has already done to keep them in his first week in office.
He mentions getting out of the Paris climate agreement, suspending international aid, and freezing federal hiring.
He also lays out the steps to address the "national energy emergency" and "unlock liquid gold under our feet".
He then rapidly pivots to pledging the US will be the global leader in artificial intelligence and cryptocurrency, bringing in the Stargate project he promoted earlier this week.
It's a long list he's going through, and the speech is very different from the improvisation-like "weave" he often used while speaking on the campaign trail.
Trump also says that "economic confidence is soaring" now in America, saying many companies have announced plans to invest "billions and billions" in the country's economy.
Image source, White HouseTrump begins his speech by claiming that his election victory heralded "the golden age" for America.
Trump says his administration has begun a "revolution in common sense" and makes a list of promises that the US and the wider world will be "wealthier" and more "peaceful" due to his presidency.
The president says his administration inherited "failed policies" and "economic chaos" and criticises deficit spending, regulations and "hidden taxes".
He says prices have gone "through the roof" and Biden "lost control" of the economy. He says he is taking action to reverse this and policies from the "radical left".
Faisal Islam
Economics editor
Here he is, Trump addressing Davos from the White House, seemingly mainly speaking from an autocue.
He will be questioned by a collection of bankers after what we expect to be a 15-minute address.
Donald Trump is speaking now.
You can watch his speech live by pressing Watch live above.
Faisal Islam
Economics editor
Inside the Trump session, it is just about to start - obviously packed, with some selectivity among the badge holders allowed in to watch the video address.
As I go in, I have David Miliband and former presidential candidate John Kerry on my right and, on my left, Avram Glazer, one of the main owners of Manchester United, the struggling football team.
Kerry says he is waiting to see what Trump has to say. Miliband’s charity is likely to be impacted by Trump’s cuts to aid and refugee spending.
Bernd Debusmann Jr
Reporting from the White House
The White House has just sent over President Trump's schedule for today.
As we reported earlier, at 1100 EST (1600 GMT), he will address the World Economic Forum in Davos remotely and participate in a panel discussion.
At 1230 EST (1730 GMT), he will receive an intelligence briefing. That, of course, takes place behind closed doors.
At 1430 EST (1930 GMT), Trump will sign an executive order, although it is unclear what that might be. That will be attended by the in-town pool, which today includes the BBC.
An hour later, he is scheduled to hold a call with Nayib Bukele, the President of El Salvador. Bukele is an outspoken supporter of Trump and something of a conservative darling for many on the right in US politics.
Later in the afternoon, Trump will record a video message and participate in a swearing-in for senior staff.
Faisal Islam
Economics editor
Image source, ReutersWhile the common theme at Davos has been the threat to the world trade system posed by President Trump, on the ground here there is an interesting split.
There aren’t many black MAGA baseball caps, but there are some representing the tech bro, libertarian backers of the returned US leader. Optimism, tax cuts and the closeness of the tech billionaires to the White House have been a theme. One Gulf official told me outside his Davos pavilion that everyone was stocking up on shares of the five tech executives in the front row of the inauguration. Massive American federal contracts would be carved up between those billionaires, I was told.
A ceasefire in Gaza, and some sort of pathway to one in Ukraine, might also lift years of geopolitical gloom.
But the optimists are outnumbered by the pessimists. By seriously threatening an EU country with tariffs for wanting to retain its sovereign territory, many here wonder about the future of the West under Trump.
The hope for some executives is that a president who sees the US stock market as a sign of his virility will see the need for restraint. Others are totally unsure if, far from the current soaring value of the dollar, the logic of this administration is the exact opposite.
Not every top US executive is hanging on every word from the new administration. Some are concerned by the targets of likely tit-for-tat retaliatory tariffs. No one was crowded around TVs watching the inauguration.
But the video link audience with the Davos elite, including questions from top bankers, could be quite the moment. Which Donald Trump is going to turn up?
Bernd Debusmann Jr
Reporting from the White House
Almost 500 undocumented criminals were apprehended in the first 33 hours of the Trump administration, according to new White House Press Secretary Karoline Leavitt.
In an interview with conservative news outlet Newsmax this morning, Leavitt said that Border Patrol and Immigrations and Customs Enforcement (ICE) officials "immediately got to work to deport violent, illegal criminals from our country".
Those already arrested "will be sent home", she said, noting that "those flights are already underway this morning".
No further details were provided.
Nadine Yousif
North America reporter
Shortly after he was inaugurated on Monday, President Donald Trump signed an executive order to end the right of citizenship for some children who are born in the US.
The order specifically applies to children who are born to parents that are in the country illegally or temporarily. It is set to apply to those who are born after 19 February.
But the order has already been the subject of legal challenges - mainly from Democratic-led states who argue it is unconstitutional.
That is because the right to citizenship to those born on US soil - also known as 'birthright' - is enshrined in the 14th Amendment of the US Constitution. The Constitution can't be amended without support from a two-thirds vote of both chambers of Congress, plus the approval by America's states.
The first legal challenge to the order will be heard Thursday morning in Seattle, where four states - Washington, Arizona, Illinois and Oregon - are asking a judge to temporarily halt it while the courts consider their arguments.
Lawyers for the US Department of Justice, meanwhile, are arguing a different interpretation of the 14th Amendment, saying it does not apply to children of non-citizens who are in the US unlawfully.
You can read more about what the states have argued, as well as how the Justice Department has responded so far in this piece here.
Kayla Epstein
US reporter
Federal employees are currently bracing for change and upheaval as the Trump administration settles in.
Employees at one agency received an email asking them to report any efforts by colleagues to "disguise" DEI (diversity, equity, and inclusion) programmes in their offices, according to a notice shared with me.
Failure to report such information within 10 days would lead to "adverse consequences," the email said.
US government employees always experience some changes with each presidential transition, but with his executive orders, Trump has signaled he plans to wrench the federal workforce in a very different direction.
Mexico builds temporary shelters for people rejected by the US
Bernd Debusmann Jr
Reporting from the White House
Good morning from the White House - where we still have very little idea about President Trump's plans today.
So far, the White House has not released a public schedule, as was also the case yesterday morning.
We do now, however, that he is slated to address the World Economic Forum at Davos about 11:00 EST (16:00 GMT). That's on the WEF's official programme.
Aside from that, we're still waiting for details.
Here at the White House, the press corps is still anxiously awaiting a first briefing from the White House's new Press Secretary, Karoline Leavitt.
It's also possible - but by no means confirmed - that Trump may today sign the Laken Riley bill into law. That bill requires undocumented immigrants who are arrested for theft or violent crimes to be held in jail pending trial.
Stay with us for more updates as the president's schedule becomes more clear.
Image source, EPA-EFE/REX/ShutterstockWe're hearing more from the World Economic Forum in Davos, where much of the talk is about the new US president.
The head of the World Trade Organization has warned that tit-for-tat trade wars could have devastating consequences for global growth.
Director-General Ngozi Okonjo-Iweala's warning follows President Trump's threats of new tariffs, including a 10% tariff on Chinese-made goods, a 25% levy on imports from Mexico and Canada, and possible tariffs on the European Union.
"If we have tit-for-tat retaliation, whether it's 25% tariff [or] 60%... we're going to see double-digit global GDP losses," Okonjo-Iweala says at the forum. "That's catastrophic. Everyone will pay."
If you're just joining us, here’s a quick look at the latest developments:
As for today's key event, at 16:00 GMT, Trump is set to give his first major speech of his second term to global political and business leaders at the World Economic Forum in Davos.
Stay with us for the latest updates and analysis.
Image source, EPAUkraine's foreign minister has welcomed Donald Trump's "strong" message to Vladimir Putin, after the US president threatened Russia with more taxes and sanctions if it doesn’t end its war with Ukraine.
"We do really welcome such strong messages from President Trump," says Andriy Sybiha, speaking at a panel at the World Economic Forum in Davos.
"We believe that (Trump) will be the winner," he adds, saying Ukraine hopes this will bring "a new dynamic in the diplomatic efforts to end this war and achieve a long-lasting, just, and comprehensive peace."
Earlier, the Kremlin has also responded to Trump, saying it remains "ready for an equal dialogue, a mutually respectful dialogue."
Trump is scheduled to speak at the World Economic Forum at 16:00 GMT.
Aside from deporting illegal migrants, US President Donald Trump has also suspended the Refugee Admissions Programme, which allows refugees to resettle in the US.
A memo from the US agency that processes refugee applications has also outlined that all previously scheduled travel of refugees to the US has been cancelled.
"It's classic Trump playbook of really demonising people who are seeking safety and refuge and asylum - people that we as a country have made promises to," Masih Fouladi, Executive Director of the California Immigrant Policy Center, tells BBC earlier.
Fouladi says there have been over 150,000 Afghans who have had their flights cancelled.
"These are individuals that twenty years ago, when we went into Afghanistan, we promised them that we would keep them safe and that we would provide a home for them if that came to be (necessary)."
"And now the country is going back on its promise."
As we've been reporting, US President Donald Trump says migrants crossing into the country illegally will be deported.
In response, Mexican authorities, anticipating mass deportations of migrants, have begun constructing temporary shelters near the US border.
Here are some recent photos from construction sites along the border with Texas.
Image source, ReutersIn the city of Ciudad Juárez, Chihuahua state, workers have been seen operating high above the ground to construct a metal framework before erecting a giant tent for migrants
Image source, ReutersA drone view shows the scale of the building works underway in Ciudad Juárez, across the border from the US city of El Paso
Image source, AFP via Getty ImagesIn the city of Matamoros, members of the Mexican Navy have been deployed to build a similar temporary shelter