George W. Bush tells Jay Leno: Not worried how history will judge --- (CNN) -- It seems George W. Bush can take a joke -- and tell one. -- But before the former President sat down with Jay Leno on the Tonight Show late Tuesday, the comedian turned his successor, Barack Obama, into the brunt of his hard jabs. -- Leno told the 43rd president that he was surprised that he agreed to appear this time. It was Bush's fourth appearance on the show. -- As he has often in the past, Bush said that history will judge his legacy. But he didn't appear concerned.-- Historians are still preoccupied with George Washington, he said. "If they're still writing biographies of the first guy, the 43rd guy doesn't need to worry." - More, Ben Brumfield, CNN