sentences:  However, after the 1970 census, Wisconsin lost a district, and most of O'Konski's territory was merged with Wisconsin's 7th congressional district represented by three-term Democratic Party member Dave Obey.O'Konski retained only about 40 percent of his former territory, a disadvantage he was unable to overcome despite his seniority.Even though Richard Nixon carried most of the district in the 1972 election, O'Konski was defeated.