It's pretty far back in time now, but the MN DFL had an awful time in 1978. Both Senate seats were up and had short-time incumbents; Walter Mondale was elected VP in '76 and Gov. Wendell Anderson pretty much appointed himself to the seat. In the other seat, Hubert H. Humphrey died in 1977 and was replaced by his widow Muriel, who didn't run in '78. The DFL lost both Senate seats and the governorship. It took them several cycles to get the Senate seats back.