First, it was Sarah Palin. Then it was Arizona Right to Life and the National Rifle Association. Most recently, the revered National Review gave its imprimatur to McCain. When Hayworth entered the race in January, McCain was at his most vulnerable point in decades. Polling showed McCain had a lead within the margin of error and was struggling to redefine himself as a Republican loyalist. But polls now show McCain with a solid lead. Baker said the McCain campaign may have engineered a sort of domino effect: Each endorsement shows the next group that backing McCain is a safer bet...