Washington -- When President Bush shakes 1,000 hands, Blake Gottesman is ready with the Purell. When Bush is in his daily intelligence briefing in the trailer on his ranch, Gottesman is on site to dog-sit Barney, the president's Scottish terrier. When a member of the White House senior staff wants a word with the boss, Gottesman is there to recommend yes or no. "People will say, 'Is this a good time to raise something?' " said Joe Hagin, the White House deputy chief of staff. "And Blake will say, 'Well, he's reviewing a speech right now,' or 'He's got a...