[2] Stofferahn ran for the United States Senate in the Republican primary in 1972, coming in fourth in a field of five (17%).

[1][4] Having changed political party affiliation, Stofferahn ran for the United States Senate in the Democratic primary in 1978, coming in second (45%).

[5] Stofferahn was elected to the South Dakota Public Utilities Commission as a Democrat in 1978, earning 55% of the statewide vote.

[7] Stofferahn was re-elected to the South Dakota Public Utilities Commission as a Democrat in 1984, earning 61% of the statewide vote.

[9] Stofferahn was re-elected to the South Dakota Public Utilities Commission as a Democrat in 1990, earning 52% of the statewide vote.