South Dakota requires candidates running in primaries for Congress to file petitions to get on a primary ballot. The primary is June 2. The petition deadline was March 31. It appears from the Secretary of State’s list of candidates that no Democrat qualified for the Democratic primary ballot for U.S. House. Democrats needed 1,615 signatures of party members. This blog post originally said there didn’t seem to be a Democrat for U.S. Senate either, but on April 2, the Secretary of State showed a Democrat had filed for that office.
Generally South Dakota Democrats running for statewide office don’t need that many signatures. The law requires a number equal to 1% of the party’s last gubernatorial vote. The Democratic nominee for Governor in 2018, Billie Sutton, did unusually well for a Democrat in South Dakota. By comparison, after the 2014 gubernatorial election, Democrats only needed 706 signatures.
The legislature adjourned March 30. At the last minute it did pass a bill delaying April municipal elections, but it does not seem to have passed any bill to alter the June primary. Thanks to Dan Fishman for alerting me to the South Dakota candidate list. South Dakota does not permit write-ins in either primaries or the general election; it is one of only four states that has never permitted any write-ins. The others are Nevada, Hawaii, and Oklahoma.