The U.S. Democratic Party's presidential candidates broadened their campaigns Sunday to the 22 states holding party contests on February 5, known as "Super Tuesday."

Illinois Senator Barack Obama is in Georgia following his victory over New York Senator Hillary Clinton in Saturday's South Carolina primary. Clinton is campaigning in Tennessee.

The Republican Party's presidential hopefuls have begun two final days of campaigning in Florida ahead of that state's primary on Tuesday.

The Florida vote is considered pivotal for the Republicans because the winner will take all the state's 57 delegates to a national convention that chooses the party's presidential candidate for the November general election.

Obama won 55 percent of the Democratic Party vote in South Carolina, more than double Clinton's tally of 27 percent. Former Senator John Edwards of North Carolina finished third in his native state with 18 percent.

Obama's win came after consecutive losses to Clinton in New Hampshire and Nevada. He won the party's first contest in Iowa.

In his victory speech, Obama characterized the Democratic primary race as being about the past versus the future. He also reached out to Republican voters, saying the change he seeks extends beyond any political party.

Exit polls indicated that Obama won South Carolina with overwhelming support from fellow African Americans and about one-quarter of the white voters.

Obama's campaign received another boost with an endorsement from Caroline Kennedy, daughter of the late U.S. President John F. Kennedy. She writes in Sunday's edition of The New York Times newspaper that Obama inspires Americans in the same way her father once did.

Meanwhile, the governor of Florida, Charlie Crist, endorsed Republican Senator John McCain of Arizona Saturday. Surveys show McCain and former Massachusetts Governor Mitt Romney leading the race for Tuesday's Republican primary.

The two other major contenders in Florida are former New York Mayor Rudy Giuliani and former Arkansas Governor Mike Huckabee.