"But I think Moore's not expecting Roberts to run. And without Pat who would be the likely GOP challenger?"
Pat Roberts is *not* going to retire in 2008, and if he doesn't run because he dies or something, Phil Kline or Jim Ryun or just about any other Republican would be able to defeat Moore in a Senate race. Remember, Moore's House district is over 6% less Republican than the state as a whole, meaning that Moore's typical 52% in the district would become at best 46% statewide in the unlikely scenario that he can con as many outstate Republicans as he has KC-area Republicans. And when was the last time a Democrat was elected to the Senate in Kansas, 1932? And, unlike Vermont, which had never elected a Democrat to the Senate until Leahy in 1974, Kansas has not been on a leftward slide, and there may never be another 1974.