President Barack Obama walks across Pennsylvania Avenue from Blair House to the White House in Washington, Friday, Dec. 9, 2011, after visiting a holiday party. (AP Photo/Carolyn Kaster)

Photo by: Carolyn Kaster

President Barack Obama walks across Pennsylvania Avenue from Blair House to the White House in Washington, Friday, Dec. 9, 2011, after visiting a holiday party. (AP Photo/Carolyn Kaster)