Democratic presidential candidate Senator Barack Obama (D-IL) speaks during a campaign stop at the Gamesa Wind Corporation in Fairless Hills, Pennsylvania, March 11, 2008. REUTERS/Keith Bedford

WASHINGTON (Reuters) - Sen. Barack Obama won the Mississippi contest to choose a Democratic presidential candidate on Tuesday, his second victory since a pair of big-state losses kept him from knocking rival Hillary Clinton out of the race, U.S. media projected.

The Mississippi victory added to Obama’s lead over Clinton but left him far short of being able to clinch the nomination to run against Republican John McCain in the November general election. Obama and Clinton are now focused on the big contest in Pennsylvania on April 22.