South Dakota Midterm Election Results By abc news Nov 6, 2018, 11:50 AM ET 0 Shares Email Star PlayABCNews.comWATCH Midterm Elections 2018: What you need to know 0 Shares Email South Dakota midterm election results will be refreshed automatically every 30 seconds after polls close at 9 p.m. ET. There is no need to refresh the page to see the latest data.