When George W. Bush leaves office Tuesday, he will do so with a 27 percent exit approval rating, lower even than Jimmy Carter’s was. I think he deserves better. Why? Because, while national security is not the president’s only job, it must be his first priority, and Bush has been an excellent wartime leader. Even when it cost him politically, he has remained a relentless and successful defender of this nation and its people. Like all of us, Bush saw those two great towers reduced to rubble, the smoke pouring from the Pentagon, the smoldering scar cut through a Pennsylvania...