Media playback is unsupported on your device

Crowds celebrate as Barack Obama re-elected as president

7 November 2012 Last updated at 04:42 GMT

Supporters of President Barack Obama celebrated in Chicago as the major networks projected he would have a majority of electoral college votes.

Mr Obama prevailed despite lingering dissatisfaction with the economy and a hard-fought challenge from Mitt Romney, a former governor of Massachusetts.

With many states still reporting results, Mr Obama's margin of victory was not yet certain.