Barack Obama urges Americans to unite behind Donald Trump

Outgoing US president Barack Obama has promised to ensure a smooth transition of power to his successor Donald Trump after his unexpected victory over Hillary Clinton.

President Barack Obama has said he is heartened by Donald Trump's call for unity after his victory adding "we are now all rooting for his success in uniting and leading the country".

Mr Obama spoke to reporters in the Rose Garden of the White House in a post-election ritual meant to signal the peaceful transition of power from one president to the next.