President Donald Trump is spending his first full day back in the White House meeting with congressional leaders, announcing an investment in artificial intelligence infrastructure and demonstrating one of his favored expressions of power: firing people.

Donald Trump took the Oath of Office and was sworn in as the 47th President of the United States. He is only the second man in the nation’s history to return to the Oval Office after a hiatus. He has promised to "act with historic speed" – and on his first day in office,