Lindsey Graham was the last truly interesting man in Washington. Even when you knew where he wanted to go, you never quite knew how he was going to get there. The Senate will be a less vivid place without him. Fritz Hollings, with whom Graham served when he first reached the Senate, quipped when he retired, “We had . . . five, six drunks when I came here. [Now], there’s nobody drunk in the United States Senate. We don’t have time to be drunk.” Today’s senators are doing a lot less work and a lot more television, but the gray ...