Conservative Republicans disenchanted with their presidential options dream that Fred Dalton Thompson is the Great Right Hope for 2008. Fans of the 65-year-old actor and former Tennessee senator call him a Southern-fried Ronald Reagan clone with impressive name recognition and a folksy appeal who can unite the party - and beat Hillary Clinton. It won't be a cakewalk for Thompson, who, after several false starts, will launch his candidacy Thursday via his I'mWithFred Web site. He's starting unusually late, has had trouble raising cash and has been soporific in recent testing-the-water outings. "The wow factor is gone," a Republican operative...