U.S. Democratic presidential nominee Senator Barack Obama (D-IL) and Senator Hillary Clinton (D-NY) attend a campaign rally in Orlando, Florida, in this file image from October 20, 2008. Clinton emerged on November 13, 2008 as a candidate to be U.S. Secretary of State for president-elect Obama, months after he defeated her in an intense contest for the Democratic presidential nomination. Picture taken October 20, 2008. Reuters Pictures 12 months ago

U.S. Democratic presidential nominee Senator Barack Obama (D-IL) and Senator Hillary Clinton (D-NY) attend a campaign rally in Orlando, Florida, in this file image from October 20, 2008. Clinton emerged on November 13, 2008 as a candidate to be U.S. Secretary of State for president-elect Obama, months after he defeated her in an intense contest for the Democratic presidential nomination. Picture taken October 20, 2008.