US President Barack Obama swept to re-election today, creating history again by defying the undertow of a slow economic recovery and high unemployment to beat Republican foe Mitt Romney.
Obama became only the second Democrat to win a second four-year White House term since World War 2, when television networks projected he would win the bellwether state of Ohio where he had staged a pitched battle with Romney.
With a clutch of swing states, including Florida and Virginia still to be declared, Obama already had 303 electoral votes, more than the 270 needed for the White House and looked set for a comfortable victory.
There was a sudden explosion of jubilation at Obama's Chicago victory party as the first African American president, who was elected on a wave of hope and euphoria four years ago, booked another four years in the White House.
Republican challenger Mitt Romney conceded defeat in the US election supporters that he had called President Barack Obama to congratulate him on his victory.