“The last truly uncompetitive U.S. Senate race in North Carolina took place more than 40 years ago in 1974 when Democratic State Attorney General Robert Morgan won an open seat race against furniture executive Bill Stevens by 25.1 points,” Ostermeier writes.
Colorado was the next competitive state with an average 8.8-point margin of victory. New Jersey, Missouri, Pennsylvania and Minnesota followed, with margins of victory just under 10 points.
The least competitive state was Wyoming, where the average victory margin was 40.4 points. Since 1990, every race in that state has been won by a larger-than-single-digit lead. The same was true in eight other states. Maryland has had the longest competitive “drought,” with the last close race (one decided by a single-digit margin) held in 1970.
Ostermeier’s analysis is based on more than 450 Senate elections since 1990.