Clinton Endorses Obama (21 images)

Chelsea Clinton signs autographs at a campaign event at the National Building Museum in Washington on June 7, 2008. Clinton formally suspended her campaign for president and endorsed Democratic Presidential candidate Sen. Barack Obama, D-IL. (UPI Photo/Patrick D. McDermott)

Sen. Hillary Rodham Clinton, D-NY, waves to her supporters at a campaign event at the National Building Museum in Washington on June 7, 2008. Clinton formally suspended her campaign for president and endorsed Democratic Presidential candidate Sen. Barack Obama, D-IL. (UPI Photo/Patrick D. McDermott)

Sen. Hillary Rodham Clinton, D-NY, thanks her supporters at a campaign event at the National Building Museum in Washington on June 7, 2008. Clinton formally suspended her campaign for president and endorsed Democratic Presidential candidate Sen. Barack Obama, D-IL. (UPI Photo/Patrick D. McDermott)

Sen. Hillary Rodham Clinton, D-NY, speaks to supporters at a campaign event at the National Building Museum in Washington on June 7, 2008. Clinton formally suspended her campaign for president and endorsed Democratic Presidential candidate Sen. Barack Obama, D-IL. (UPI Photo/Patrick D. McDermott)