Obama outlines plans for running against McCain in November

She said it would be "exciting to have the first mother in the White House."

"Part of what that would mean is that we would have someone who has lived the experiences that many of us share," she said.

Clinton has struggled to raise money in recent weeks, and was set back further this week when she squeaked by with a narrow win in Indiana while Obama won handily in North Carolina. Aides also disclosed that Clinton had lent her campaign $6.4 million since mid-April, and said she had not ruled out doing so again. The recent loans come after a separate $5 million loan in February.

Clinton is favored to win Tuesday's primary in West Virginia, and on Saturday she implored her audience to stick with her.

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Sara Kugler reported from New York.