FROM CNN's Jack Cafferty: John McCain became a household name by riding across country in a bus called The Straight Talk Express. But these days, "straight talk" seems just about the last way to describe what's coming out of his mouth. [cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2010/images/08/23/art.sad.mccain.jpg caption=""] McCain now holds a comfortable lead over his primary opponent, J.D. … Continue reading Political ambition ruined McCain's legacy?