Two independent candidates for U.S. Senate are petitioning to be on the South Dakota general election ballot. Besides former U.S. Senator Larry Pressler, there is Gordon Howie. See this story. Howie is described as the “tea party” candidate.
In 2010, Howie had run in the Republican primary for Governor. That primary had five candidates on the June ballot. The results were: Dennis Daugaard 50.4%, Scott Munsterman 17.6%, Dave Knudson 15.8%, Howie 12.4%, and Ken Knuppe 3.8%.