If elected president, Sen. John McCain promises to stage a press conference every week, a singular horror that, of itself, should be enough to doom his chances.This McCain threat shows no mercy for his staff, which trails this creaky circus doing what the man with the shovel does for the elephant. "Being human and tripping over your tongue occasionally doesn't mean a thing," said one top official for the GOP nominee. By contrast, McCain dismissed his opponent's verbal appeal last week as Sen. Barack Obama blitzed the Middle East and Europe, smooth-talking some 200,000 in Berlin.