Joe Wilson wasn't a truth-teller.ONE DAY LAST OCTOBER, Ambassador Joe Wilson, his wife Valerie in tow, traveled to the National Press Club in downtown Washington, D.C., for lunch. It was a big day for Wilson. He was the guest of honor at a banquet thrown by the Nation Institute, which publishes the Nation, the venerable lefty weekly. Daniel Ellsberg was there. So was New Jersey senator Jon Corzine. Towards the end of lunch, plates of cold salad shunted aside, Wilson was invited onstage. Looking the part of a globetrotting former diplomat in his Zegna suit and trademark Hermès tie, he...