President Donald Trump, who spent his first full day in office berating the media over their coverage of his inauguration, will spend Sunday engaged in more routine matters, like overseeing the swearing in of high-level staffers.

On the second full day of his administration, Trump will see the "assistants to the president" sworn in, according to his press secretary, Sean Spicer. He'll also hold a reception for law enforcement officers and first responders who helped with his inauguration as he celebrates his 12th wedding anniversary.

White House staff are scheduled to have a briefing on ethics and another on the proper use and handling of classified information as they begin to make themselves comfortable in their new White House offices.

While Trump has said that he'll consider Monday his first real day in office, he is already making clear that sparring with the press will be a defining aspect of his administration.

Trump turned a bridge-building first visit to CIA headquarters on Saturday into an airing of grievances about "dishonest" journalists, while wildly overstating the size of the crowd that gathered on the National Mall as he took the oath of office. Trump said throngs "went all the way back to the Washington monument," despite photos and live video showing the crowd stopping well short of the landmark.

Standing in front of a memorial for fallen CIA agents, Trump assured intelligence officials, "I am so behind you." He made no mention of his repeated criticism of the intelligence agencies following the election, including his public challenges of their high-confidence assessment that Russia meddled in the White House race to help him win.

"There is nobody that feels stronger about the intelligence community and CIA than Donald Trump," he said, blaming any suggestion of a "feud" on the media.