The new White House Press Secretary furiously lashed out at the media in his first briefing
Donald Trump and his White House team have accused the media of dishonestly in reporting the size of the crowd at Friday's inauguration - despite photographic and other evidence to the contrary.
The President insisted that crowds at the event stretched back all the way to the Washington Monument, even though photographs and footage from the scene showed large, empty spaces around the landmark.
In a series of tweets on Sunday, Mr Trump tweeted about television ratings compared to President Obama's second inauguration in 2011. Figures reported by Bloomberg show that the viewership fell short of the numbers recorded for both Obama's 2009 inauguration and Ronald Reagan's first address in 1981.
Wow, television ratings just out: 31 million people watched the Inauguration, 11 million more than the very good ratings from 4 years ago!— Donald J. Trump (@realDonaldTrump) January 22, 2017
Press Secretary Sean Spicer went one further during a heated White House briefing on Saturday night, describing it as "the largest audience ever to witness an inauguration, period".
He also claimed that white "floor coverings" used to protect the grass during the ceremony had unfairly drawn attention to empty spaces on the National Mall.
With pictures from Mr Trump's inauguration on TV screens beside him, Mr Spicer added: "Attempts to lessen the enthusiasm of the inauguration are shameful and wrong."
Although the National Park Service no longer provides estimates of crowds at inaugurations, photographic evidence shows substantially more people turned out for Barack Obama's ceremony in 2009.
Data shared by the Washington Metro authorities also showed a significantly smaller number of people using the system on Friday compared to both of Obama's inauguration days.
Metro Ridership: As of 11am, 193k trips taken so far today. (11am 1/20/13 = 317k, 11am 1/20/09 = 513k, 11am 1/20/05 = 197k) #wmata— Metro (@wmata) January 20, 2017
During yesterday's conference, a visibly angry Mr Spicer also criticised a reporter who wrongly stated that President Trump has removed a bust of Martin Luther King Jr from the Oval Office.
"There's been a lot of talk in the media about the responsibility to hold Donald Trump accountable, and I'm here to tell you it goes two ways. We're going to hold the press accountable as well," the White House official warned.
During the briefing, the Press Secretary did not take questions from the press. However, it contained a number of inaccuracies and misrepresentations, including over Metro figures.
CNN has confirmed Wash Po numbers from Metro on full inaugural day ridership. For Trump: 570.5k. Obama '09: 1.1m. Obama '13: 782k.— Jim Acosta (@Acosta) January 22, 2017
Trump meets with CIA
Yesterday, hundreds of thousands of people descended on cities across the US and the world to protest against Mr Trump's presidency.
This morning, Mr Trump broke his silence on the protests in one of his first tweets from his personal Twitter account since taking office.
Watched protests yesterday but was under the impression that we just had an election! Why didn't these people vote? Celebs hurt cause badly.— Donald J. Trump (@realDonaldTrump) January 22, 2017
As the major demonstration took place in Washington DC, Mr Trump attempted to repair relations with the US intelligence community during a visit to CIA headquarters.
The new President has spent weeks criticising America's security agencies over their claims that Russia attempted to skew the results of the election.
He went as far as claiming that outgoing CIA director John Brennan was a "leaker of fake news".
But, on his first full day in office, Mr Trump visited the CIA's base at Langley in Virginia and told employees the media had invented a "feud".
He said he was behind them 1,000%, adding: "There is nobody that feels stronger about the intelligence community and the CIA than Donald Trump.
"I'm so behind you. You're going to get so much backing that you're going to start saying, 'Don't give us so much backing.'
"I love you, I respect you, there is no one I love more, we are going to start winning again and you will be leading the charge."
He also vowed: "We have to get rid of ISIS. Radical Islamic terrorism needs to get eradicated off the face of the earth."
The President riffed on his election success, how young he feels, how popular he remains with the men and women of the US military, and hinted at a third Iraq war.
Mr Trump had risked alienating the intelligence community that now reports to him with his reaction to their investigation into hacking of Democrats during the presidential election campaign.
Director of National Intelligence James Clapper told a congressional committee that such "disparagement" risked undermining the relationship.
Earlier on Saturday, Mr Trump attended an inaugural interfaith prayer service at Washington's National Cathedral. He was joined by First Lady Melania and much of the extended First Family.
On his ride back to the White House, the presidential motorcade crossed paths with a number of protesters making their way to the huge march on Washington.
Since taking office, the 45th President has begun putting some of his campaign promises into action, including a move to begin dismantling Obamacare.
His new defence secretary, retired Marine General James Mattis, paid a visit to the Pentagon hours after he was confirmed and sworn in.