
Former President George W. Bush and former first lady Laura Bush, right, unveil their portraits in the East Room of the White House in Washington, Thursday, May 31, 2012. (AP Photo/Carolyn Kaster)

Former President George W. Bush and former first lady Laura Bush, right, unveil their portraits in the East Room of the White House in Washington, Thursday, May 31, 2012. (AP Photo/Carolyn Kaster)

President Barack Obama and former President George W. Bush arrive in the East Room of the White House in Washington, Thursday, May 31, 2012, for Bush's portrait unveiling. (AP Photo/Charles Dharapak)

President Bill Clinton and first lady Hillary Rodham Clinton applaud as former President George H.W. Bush and former first lady Barbara Bush stand near the presidential portrait of Mr. Bush at its unveiling at the White House in 1995. A portrait of Mrs. Bush was unveiled as well. (Associated Press)

White House Press Secretary Jay Carney

President Bill Clinton and first lady Hillary Rodham Clinton applaud as former President George H.W. Bush and former first lady Barbara Bush stand near the presidential portrait of Mr. Bush at its unveiling at the White House in 1995. A portrait of Mrs. Bush was unveiled as well. (Associated Press)

White House Press Secretary Jay Carney

** FILE ** In this May 29, 2012 photo, President Obama speaks in the East Room of the White House in Washington. Obama's campaign was opening a new critique of Mitt Romney's record on Wednesday, focusing attention on the Republican nominee's economic agenda while he served as governor of Massachusetts. (AP Photo/Charles Dharapak, File)

** FILE ** President Obama shakes hands with former President George W. Bush in the Rose Garden at the White House in Washington on Jan. 16, 2010. Mr. Obama frequently blames Mr. Bush for America's shaky economy, high unemployment and foreign policy woes, but he's sure to change his tune on Thursday when Mr. Bush and former first lady Laura Bush come back to the White House for the unveiling of the Bushes' portraits. (AP Photo/Pablo Martinez Monsivais)