Jonathan Martin writes that control of the Senate may now hinge on the races in California, Wisconsin, and Washington state. As he notes, all three incumbents–Boxer, Feingold, and Murray–were first elected to the Senate in 1992. All of their previous races were conducted with a favorable climate. Presidential races helped them in 1992 and 2004; 1998 turned out to be a good Democratic year. This is the first time they are running against the wind.