Former President George W. Bush and former first lady Laura Bush stand together on stage during a ceremony to unveil their portraits in the East Room of the White House in Washington, Thursday, May 31,2012. (AP Photo/Carolyn Kaster)

President Barack Obama laughs as he and first lady Michelle Obama listen to former President George W. Bush during the unveiling of his official portrait in the East Room at the White House in Washington, Thursday, May 31, 2012. (AP Photo/Charles Dharapak)

Former first lady Barbara Bush arrive for the unveiling ceremony of former President George W. Bush and former first lady Laura Bush's 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 stand together on stage during a ceremony to 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 first lady Michelle Obama applaud in the East Room of the White House in Washington, Thursday, May 31, 2012, during a ceremony to unveil portraits of former President George W. Bush and former first lady Laura Bush. (AP Photo/Carolyn Kaster)

Vice President Joe Biden greets the man in the East Room of the White House in Washington, Thursday, May 31, 2012, during a ceremony to unveil portraits of former President George W. Bush, and former first lay Laura Bush. (AP Photo/Carolyn Kaster)

President Barack Obama greets former President George W. Bush and former first lady Laura Bush in the East Room of the White House in Washington, Thursday, May 31, 2012, during ceremony to unveil the Bush portraits. (AP Photo/Carolyn Kaster)

President Barack Obama and former President George W. Bush take part in a ceremony in the East Room of the White House in Washington, Thursday, May 31, 2012, to unveil the Bush portrait. (AP Photo/Pablo Martinez Monsivais)

President Barack Obama speaks during the unveiling of the Bush’s portraits during a ceremony in the East Room of the White House in Washington, Thursday, May 31,2012. (AP Photo/Carolyn Kaster)

President Barack Obama attends the unveiling of the Bush’s portraits during a ceremony 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 receive a standing ovation during a ceremony to unveil their portraits in the East Room of the White House in Washington, Thursday, May 31,2012. (AP Photo/Carolyn Kaster)

President Barack Obama speaks during the unveiling of the Bush’s portraits during a ceremony 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 stand together on stage during a ceremony to unveil their portraits in the East Room of the White House in Washington, Thursday, May 31,2012. (AP Photo/Carolyn Kaster)

First lady Michelle Obama speaks during a during a ceremony to unveil the portraits of former President George W. Bush and former first lady Laura Bush, both standing left with President Barack Obama in the East Room of the White House in Washington, Thursday, May 31,2012. (AP Photo/Carolyn Kaster)

First lady Michelle Obama speaks during a during a ceremony to unveil the portraits of former President George W. Bush and former first lady Laura Bush in the East Room of the White House in Washington, Thursday, May 31,2012. (AP Photo/Carolyn Kaster)

Karl Rove, Senior Advisor and Deputy Chief of Staff to former President George W. Bush, attends a ceremony to unveil the portraits of former President George W. Bush and former first lady Laura Bush in the East Room of the White House in Washington, Thursday, May 31,2012. (AP Photo/Carolyn Kaster)

First lady Michelle Obama speaks during a during a ceremony to unveil the portraits of former President George W. Bush and former first lady Laura Bush in the East Room of the White House in Washington, Thursday, May 31,2012. (AP Photo/Carolyn Kaster)

Former Attorney General John Ashcroft is pictured after the unveiling of the official portraits of former President George W. Bush and former first lady Laura Bush in the East Room at the White House in Washington, Thursday, May 31, 2012. (AP Photo/Charles Dharapak)

Former White House Chief of Staff Andy Card is seen in the East Room of the White House in Washington, Thursday, May 31, 2012, during a ceremony to unveil the official portraits of former President George W. Bush and former first lady Laura Bush. (AP Photo/Pablo Martinez Monsivais)

Former President George W. Bush unveils his portrait, Thursday, May 31, 2012, in the East Room of the White House in Washington. (AP Photo/Carolyn Kaster)

Former Secretary of State Colin Powell is seen in the East Room of the White House in Washington, Thursday, May 31, 2012, during a ceremony to unveil the official portraits of former President George W. Bush and former first lady Laura Bush. (AP Photo/Pablo Martinez Monsivais)

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

Jenna Bush, left, and Barbara Bush, right, daughters of former President George W. Bush, have their photo taken, in the East Room of the White House in Washington, Thursday, May 31, 2012, during a ceremony to unveil President Bush's portrait. (AP Photo/Pablo Martinez Monsivais)

Marvin Bush and Doro Bush Koch are seen at the official portrait unveiling for former President George W. Bush and former first lady Laura Bush in the East Room at the White House in Washington, Thursday, May 31, 2012. (AP Photo/Charles Dharapak)

President Barack Obama and first lady Michelle Obama applaud former President George H.W. Bush and former first lady Barbara Bush, not seen, during the portrait unveiling ceremony for former President George W. Bush and former first lady Laura Bush portraits, Thursday, May 31, 2012, in the East Room of the White House in Washington. (AP Photo/Carolyn Kaster)

President Barack Obama walks with former President George W. Bush during the unveiling of his official portraits in the East Room at the White House in Washington, Thursday, May 31, 2012. (AP Photo/Charles Dharapak)

The official White House portrait of former President George W. Bush, by artist John Howard Sanden, is seen on stage during its unveiling ceremony, Thursday, May 31, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

Former adviser Karl Rove and former White House Press Secretary Dana Perino are seated before the unveiling of the official portraits of former President George W. Bush and former first lady Laura Bush in the East Room at the White House in Washington, Thursday, May 31, 2012. (AP Photo/Charles Dharapak)

The official White House portrait of former first lady Laura Bush, by artist John Howard Sanden, is seen on stage during its unveiling ceremony, Thursday, May 31, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)