FILE - In this Nov. 13, 2006, file photo, then-President George W. Bush is greeted by former President Bill Clinton, right, before speaking at the groundbreaking ceremony for the Martin Luther King Jr. National Memorial on the National Mall in Washington. President Barack Obama has reached out to former Presidents Bush and Clinton to help with U.S. relief efforts in Haiti.(AP Photo/Pablo Martinez Monsivais, File) FILE - In this Nov. 13, 2006, file photo, then-President George W. Bush is greeted by former President Bill Clinton, right, before speaking at the groundbreaking ceremony for the Martin Luther King Jr. National Memorial on the National Mall in Washington. President Barack Obama has reached out to former Presidents Bush and Clinton to help with U.S. relief efforts in Haiti.(AP Photo/Pablo Martinez Monsivais, File)