Clinton not giving up

Hillary Clinton, the winner of today's Puerto Rico primary, declared that she now leads in the overall popular vote and told superdelegates that she would be the stronger Democratic nominee.

"We are winning the popular vote because we have stood for the core principles of the Democratic Party," she told supporters at a hotel rally in San Juan, saying voters had ignored those who said the Democratic race is all but over and had shown who they believe would be the better candidate in the fall.

"You've come out strong and defied the skeptics," she said.

When she mentioned rival Barack Obama and the historic nature of both their candidacies, some backers booed, until she gestured for them to quiet down.

Clinton said that after Tuesday's final primaries in Montana and South Dakota, she believes that neither she nor Obama will reach the 2,118 delegates needed to clinch -- and that it will be up the superdelegates.

She also gave "special thanks" to Latinos and Hispanics in Puerto Rico and across the country, who have turned into some of her core supporters.

"I am so honored that you have stood by me in this campaign," she said.