One sunny day in 2005, an old man approached the White House from across Pennsylvania Avenue, where he'd been sitting on a park bench. He spoke to the Marine standing guard and said, "I would like to go in and meet with President Kerry." The Marine replied, "Sir, Mr. Kerry is not President and doesn't reside here." The old man said, "Okay," and walked away. The following day, the same man approached the White House and said to the same Marine, "I would like to go in and meet with President Kerry" The Marine again told the man, "Sir, as...