The Democratic nomination contest stormed through Ohio and Texas for one more day Monday, with Hillary Clinton's campaign accusing Barack Obama of criticizing NAFTA in Ohio but letting an adviser tell Canadians it was all a political posture.

It was part of a media relations blitz unleashed by the Clinton campaign in the final hours before crucial votes are taken Tuesday in four states.

Melissa Block and Robert Siegel talk with NPR reporters David Greene and Don Gonyea.

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