Chelsea campaigns for mom - Chelsea Clinton reacts as her

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Chelsea Clinton reacts as her mother, Democratic presidential candidate U.S. Senator Hillary Clinton talks about Russia's President Vladimir Putin at a campaign stop in Hampton. January 6, 2008. (Reuters/Brian Snyder)

In This Pic : U.S. Senator Hillary Clinton, U.S. Senator, Senator, Hillary Clinton, Hillary, Democratic presidential candidate, Democratic presidential, Clinton, Chelsea Clinton, Chelsea

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Chelsea Clinton (r) looks at a resident's dog as her mother Democratic presidential hopeful New York Senator Hillary Clinton campaigns door-to-door January 6, 2008 in Manchester, New Hampshire. (AFP Photo/Stan Honda)

In This Pic : U.S Senator, Senator Hillary Clinton, Senator, manchester, Hillary Clinton, Hillary, Democratic presidential, Clinton, Chelsea Clinton, Chelsea, campaign rally, campaign

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Democratic presidential hopeful Sen. Hillary Rodham Clinton stands on a box to speak to supporters before they go out and canvas for her campaign in Manchester, New Hampshire., January 6, 2008. (AP Photo/Elise Amendola)

In This Pic : Rodham, Hillary Rodham Clinton, Hillary Rodham, Hillary Clinton, Hillary, Democratic presidential, Clinton, campaign rally, campaign

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Democratic presidential candidate U.S. Senator Hillary Clinton hugs her daughter Chelsea at a campaign rally in Manchester, New Hampshire January 7, 2008, the eve of the New Hampshire Primary. (Reuters/Brian Snyder)

In This Pic : U.S. Senator Hillary Clinton, New Hampshire Primary, manchester, Hillary Clinton, Hillary, Democratic presidential candidate, Democratic presidential, Clinton, Chelsea Clinton, Chelsea, campaign rally

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Chelsea Clinton, far right, daughter of Democratic presidential hopeful, Sen. Hillary Rodham Clinton, shakes hands with Stanley Cheney as nurses watch at the Masonic Home in Manchester, N.H. as she canvases for her mother's campaign, January 6, 2008. (AP Photo/Elise Amendola)

In This Pic : Stanley Cheney, Rodham Clinton, Masonic Home, manchester, Hillary Rodham Clinton, Hillary Clinton, Hillary, Democratic presidential, Clinton, Chelsea Clinton, Chelsea