President Barack Obama has sought to calm fears over Donald Trump's forthcoming presidency and his commitment to the United States' strategic alliances.
Trump's numerous controversial statements throughout his election campaign included signs that he could question the validity of Nato and other overseas commitments when he takes up his presidency in 2017.
But Obama addressed concerns over Trump's position, saying: "In my conversation with the president-elect, he expressed a great interest in maintaining our core strategic relationships, and so one of the messages I will be able to deliver is his commitment to Nato and the transatlantic alliance."
Obama, who has spent the last week soothing fears about Trump's policies and called for unity over his future presidency, has previously said "nobody said democracy's supposed to be easy", when questioned about America's decision to elect the Republican candidate.
Addressing members of the press at the White House, Obama said: "There is no weakening of resolve when it comes to America's commitment to maintaining a strong and robust Nato relationship and a recognition that those alliances aren't just good for Europe, they're good for the United States and they're vital for the world."
In a conference call with the Democratic National Committee, Obama told members: "You're allowed to mope for a week-and-a-half, maybe two. But after that, we've got to brush ourselves off and get to work."
The Democratic Party has entered a period of soul-searching after losing both the presidency and Congress to the Republicans last week, and faces the prospect of a race for around two dozen Senate seats in 2018 - many of which are in deeply conservative states.
Gara LaMarche, president of the Democracy Alliance, said: "There's a general feeling that the Democratic Party itself needs some serious reform and has grown very distant from the kind of communities it represents."