I was mistaken in my pre-election analysis about voter turnout in South Dakota. I had thought that we might see historically high numbers (75% plus) given the nature of the election– particularly the Duel on the Prairie for South Dakota’s seat in the House of Representatives.
However, we had an average-to-low turnout of 62.26%. Looking at the official numbers again, we can see the following had voter turnout below 50%:
Each of these counties was one in which Heidepriem won a majority (as noted here). In fact, these counties represent 6 of the 9 counties in which he received a majority of the votes.
It would be interesting to know more about voter composition of these counties. That aside, it would appear that low voter turnout corresponded with a greater percentage of votes for the Democratic candidate for governor of South Dakota.