Hillary, Chelsea team up to campaign

U.S. Democratic presidential candidate Senator Hillary Clinton (L) and her daughter Chelsea Clinton (R) attend a campaign event at the Constitution Hall in Washington D.C., the United States, March 26, 2008

U.S. Democratic presidential candidate Senator Hillary Clinton (front, L) and her daughter Chelsea Clinton (front, R) attend a campaign event at the Constitution Hall in Washington D.C., the United States, March 26, 2008

U.S. Democratic presidential candidate Senator Hillary Clinton (front) speaks during a campaign event at the Constitution Hall in Washington D.C., the United States, March 26, 2008

U.S. Democratic presidential candidate Senator Hillary Clinton (L) speaks during a campaign event at the Constitution Hall in Washington D.C., the United States, March 26, 2008

U.S. Democratic presidential candidate Senator Hillary Clinton (front,L) greets supporters during a campaign event at the Constitution Hall in Washington D.C., the United States, March 26, 2008