President Obama is to welcome his successor Donald Trump to the White House for talks aimed at smoothing over the transition of power.
It could prove a difficult meeting with Mr Trump having questioned Mr Obama’s US citizenship and promising to dismantle some of his key policies.
Mr Obama though has said he is “rooting” for Mr Trump after his shock defeat of Hillary Clinton.
Thousands have taken to the streets of major US cities denouncing Mr Trump.
Mr Obama – who for his part had branded Mr Trump “unfit” for office and campaigned against him – urged all Americans to accept the result of Tuesday’s election.
“We are now all rooting for his success in uniting and leading the country,” he said.
The defeated Mrs Clinton also told supporters Mr Trump had to be given a “chance to lead”.
In his victory speech in the early hours of Wednesday, Mr Trump vowed to “bind the wounds of division”, after an acrimonious election contest, and to be “president for all Americans”.
White House spokesman Josh Earnest has insisted Mr Obama will be sincere about ensuring a smooth handover when he meets Mr Trump, although he added: “I’m not saying it’s going to be an easy meeting.”
With the Republicans holding a majority in both chambers of the US Congress Mr Trump has an easier path to pass his laws and scrap key Obama initiatives like his healthcare reforms.
The president-elect will be accompanied to the White House on Thursday morning (1600 GMT) by his wife, Melania, who will have a meeting with First Lady Michelle Obama.