Barack and Michelle Obama
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Barack Obama says: 'Best is yet to come'

7 November 2012 Last updated at 23:08 GMT

US President Barack Obama has pledged "the best is yet to come", after a decisive re-election victory over Republican challenger Mitt Romney.

After a hard-fought campaign which highlighted America's political divide, Mr Obama pledged, as he did four years ago, to work with his opponents.

Mr Romney echoed that call for unity as he graciously admitted defeat.

Voters also left the Democrats in charge of the Senate and Republicans leading the House of Representatives.

Philippa Thomas reports from Washington.