clinton stretches her dollars as race stretches on.

As the Democratic primary campaign grinds on, money has become one of New York Sen. Hillary Clinton's biggest problems. Some of the most determined presidential candidates have been forced out of contention when their coffers ran dry, but few could have foreseen Clinton's funding drying up. When she launched her campaign in January 2007, conventional wisdom held that she would vacuum up all available cash in the Democratic primaries. And in traditional terms, she did. Her donors were mainly big givers with track records of giving to Democrats. But many of them quickly hit the $2,300 contribution limit and were effectively sidelined.

Still, Clinton's spending now outstrips her fundraising. Colby College political scientist Anthony Corrado says, "We've now reached the point in the campaign where Senator Clinton's fundraising cannot support the costs of the campaign." But the campaign continues, thanks to personal loans from Clinton and her husband, former President Bill Clinton. Their loans exceeded $6 million in the past month.

-excerpt from NPR