New York: Monday was Presidents' Day in the United States - a national public holiday created to mark George Washington's birthday but that now honours all those who have served as president.

People gather in front of the White House on Presidents' Day to protest against Donald Trump declaring a national emergency along the southern border. Credit:AP

Protesters in major cities like Chicago, New York and Los Angeles used their day off to hold rallies opposing Donald Trump's decision to declare an emergency at the US-Mexico border.

Meanwhile Trump was at Mar-a-Largo, his members-only resort in Florida, where he engaged in two of his favourite pastimes: a morning game of golf and a flurry of dark and angry tweets.