Hillary Rodham Clinton vowed Wednesday to continue her quest for the Democratic nomination, arguing she would be the stronger nominee because she appeals to a wider coalition of voters -- including whites who have not supported Barack Obama in recent contests.

"I have a much broader base to build a winning coalition on," she said in an interview with USA TODAY. As evidence, Clinton cited an Associated Press article "that found how Sen. Obama's support among working, hard-working Americans, white Americans, is weakening again, and how whites in both states who had not completed college were supporting me."