We're told the president has already written his private letter to Barack Obama - and will leave it in the drawer of the president's desk in the Oval Office for the new president.
By CBS News White House correspondent Mark Knoller
In their final hours in the White House, President and Mrs. Bush will have a family dinner tonight with their daughters and with former President Bush and First Lady Barbara Bush.
(AP Photo/Haraz N. Ghanbari)
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