........But his greatest presidential stumbling block may be right under his nose. At home, Newt's second wife, Marianne Ginther Gingrich, tells me she doesn't see herself in the First Lady's job. "Watching Hillary has just been a horrible experience," commiserates Marianne. "Hillary sticking her neck out is not working." What happens if Newt runs?, I ask. "He can't do it without me," she replies. "I told him if I'm not in agreement, fine, it's easy" --she giggles at her naughtiness. "I just go on the air the next day, and I undermine everything...I don't want him to be president and...