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Barack Obama has pulled ahead in the race for Iowa's Democratic presidential caucuses, while the party's national frontrunner Hillary Clinton has slipped to second in the leadoff nominating state, according to The Des Moines Register's new Iowa Poll...

Obama spent weeks in October and November attacking Clinton's support for a measure that allowed President Bush to declare the Iran's Revolutionary Guard a terrorist organization, a move Obama said was a step toward war. Clinton said the measure enhanced U.S. negotiating strength with Iran.

"An Iran war terrifies me," said Browne, a 30-year-old University of Iowa student.

Browne said she feels Obama is a more inspirational candidate than Clinton, despite the intensifying crossfire between them.

"I just think that Obama is more of a positive candidate overall," she said...

On women voters...

In the new poll, Obama leads with support from 31 percent of women likely attend the caucuses, compared to 26 percent for Clinton. In October, Clinton was the preferred candidate of 34 percent of women caucusgoers, compared to 21 percent for Obama.

On younger voters...

Obama also dominates among younger caucusgoers, with support from 48 percent from those younger than 35. Clinton was the choice of 19 percent in that group and Edwards of 17 percent.

The momentum is just starting to build.