Obama tries to convert promise to support in Iowa

By John Whitesides and Andrew Stern

MUSCATINE, Iowa (Reuters) - Time is running short for Democrat Barack Obama, who has struggled to turn the early promise and enthusiasm of his 2008 presidential campaign into support.

The first-term U.S. senator from Illinois draws big crowds and raises big money, but lags well behind front-runner Hillary Clinton in national polls as he heads into a possibly decisive three-way struggle in Iowa with Clinton and John Edwards.

In Iowa, which launches the state-by-state battle for the Democratic nomination, polls show the race tightening into essentially a dead heat with his two top rivals less than two months before the January 3 contest.

The battle is a must-win for Obama if he hopes to overtake Clinton and reshape a race he entered earlier this year in a blaze of excitement, publicity and record-setting fund raising.

"He's an attractive, smart candidate, but I don't think people have figured out yet why they should vote for him," said Peverill Squire, a University of Iowa political analyst.

Obama, who hopes to become the first black elected to the White House in the November 2008 election, has struggled to balance his promise of a less confrontational brand of politics with the need to draw sharp contrasts with Clinton.

His pledge to close the partisan divide has not always resonated with Democrats angered by President George W. Bush.

"The idea that he would be the candidate to bring both sides together -- I'm not sure that is what Democrats are looking for this year," Squire said. "They are looking for someone with a harder edge."