Obama, Clinton trade barbs over negative tactics

Democratic presidential candidates Barack Obama and Hillary Clinton accused each other on Saturday of waging negative campaigns as they sped across Pennsylvania before next week's potentially make-or-break primary election.

Obama described the former first lady's tactics as: "We're going to throw whatever we want at Barack, whether it's true, whether it's false, whether it's exaggerated, whether it's relevant, because that's, according to Senator Clinton, what the Republicans will do."

The Clinton campaign returned fire, saying an Obama ad deliberately misrepresented her health care policy and taking umbrage at comments by a U.S. general and Obama supporter who said Clinton lacked the "moral authority" to lay a wreath on a soldier's grave.