GOODBYE TO ALL THAT: On his last day in office, I was permitted to follow the president from his last visit to the Oval Office into the residence, where Nancy was waiting for him. For the next half hour, it was just the Reagans, a uniformed Secret Service guard, and me as they stood in the hallway, awaiting the arrival of President-elect Bush, for the drive to Capitol Hill. If you visit the Ronald Reagan library, as you leave the Oval Office model, you will see this picture, life-size on the wall. It is the last picture you will see in the library.