It's an endorsement that could be a blessing or a curse.
John Kerry, the former Democratic presidential candidate, announced his support for Barack Obama yesterday as part of the Illinois Senator's effort to seize the momentum back from his rival Hillary Clinton.
Mr. Kerry, who narrowly lost to George W. Bush in 2004, invoked the memory of slain civil rights leader Martin Luther King Jr. and predicted Mr. Obama, 46, could "lead a transformation, not just a transition" in U.S. politics.
"Martin Luther King said that the time is always right to do what is right," Mr. Kerry said at a rally in Charleston, S.C., where Democrats will hold their first Southern primary on Jan. 26.
"How easy it is to forget that Martin Luther King was just 26 when he led the Montgomery bus boycott. And how easy to forget that he was just 34 when he inspired America with a dream, a powerful dream," said Mr. Kerry, who helped launch Mr. Obama's political career when he selected him to deliver the keynote address at the 2004 Democratic convention.
"My friends, when we choose a president, we are electing judgment and character, not years on this Earth."
His remarks were aimed squarely at Hillary Clinton, the New York Senator and former first lady, who made a surprise comeback from third place in the Iowa caucuses to win this week's New Hampshire primary. Mr. Obama's success in wooing one of the Democrats' elder statesmen was designed to show his appeal extends beyond the young people and independents who have fuelled his success in the party's presidential race.
But it may also be a double-edged sword. Mr. Kerry provokes emotions ranging from ambivalence to anger among many Democrats, who were deeply disappointed he narrowly lost to Mr. Bush.
And big-name political endorsements have a history of going sour. Al Gore backed Howard Dean for the Democratic nomination in 2004, but the former Vermont governor's campaign unravelled anyway.
"The Kerry endorsement helps Obama some, but Kerry is not a beloved figure among Democrats," said Cal Jillson, a political scientist at Southern Methodist University in Dallas. "Many blame him for running an ineffectual race in 2004."
By endorsing Mr. Obama, Mr. Kerry also snubbed John Edwards, the former North Carolina senator who was his vice-presidential running mate in 2004 and is struggling to remain a viable Democratic candidate this year.
But his target yesterday was Ms. Clinton, who has said Mr. Obama is raising "false hopes" of dramatic change in the United States if he wins. "Don't let anyone tell you to accept the downsizing of the American dream," Mr. Kerry said.
Before his move, Ms. Clinton had the support of 10 Democratic senators and Mr. Obama just two.
Ironically, the one endorsement that could count for something among Democrats is one neither candidate may get --from Mr. Gore himself.
The former vice-president's political stock has risen dramatically in the past four years, primarily because of his advocacy for action on climate change and his Nobel Peace Prize. "Gore's endorsement would be valuable and it is not clear to whom it would go," Mr. Jillson said.