United States House election in South Dakota, 2026 (June 2 Democratic primary)

← 2024
South Dakota's At-large Congressional District
Democratic primary Republican primary General election
Election details
Filing deadline: March 31, 2026
Primary: June 2, 2026 Primary runoff: July 28, 2026 General: November 3, 2026
How to vote
Poll times: 7 a.m. to 7 p.m. Voting in South Dakota
Race ratings
Cook Political Report: Solid Republican Inside Elections: Solid Republican Sabato's Crystal Ball: Safe Republican
Ballotpedia analysis
U.S. Senate battlegrounds U.S. House battlegrounds Federal and state primary competitiveness Ballotpedia's Election Analysis Hub, 2026
See also
South Dakota's At-large Congressional District U.S. Senate • At-large South Dakota elections, 2026 U.S. Congress elections, 2026 U.S. Senate elections, 2026 U.S. House elections, 2026 Alabama U.S. House racesAlaska U.S. House raceArizona U.S. House racesArkansas U.S. House racesCalifornia U.S. House racesColorado U.S. House racesConnecticut U.S. House racesDelaware U.S. House raceFlorida U.S. House racesGeorgia U.S. House racesHawaii U.S. House racesIdaho U.S. House racesIllinois U.S. House racesIndiana U.S. House racesIowa U.S. House racesKansas U.S. House racesKentucky U.S. House racesLouisiana U.S. House racesMaine U.S. House racesMaryland U.S. House racesMassachusetts U.S. House racesMichigan U.S. House racesMinnesota U.S. House racesMississippi U.S. House racesMissouri U.S. House racesMontana U.S. House racesNebraska U.S. House racesNevada U.S. House racesNew Hampshire U.S. House racesNew Jersey U.S. House racesNew Mexico U.S. House racesNew York U.S. House racesNorth Carolina U.S. House racesNorth Dakota U.S. House raceOhio U.S. House racesOklahoma U.S. House racesOregon U.S. House racesPennsylvania U.S. House racesRhode Island U.S. House racesSouth Carolina U.S. House racesSouth Dakota U.S. House raceTennessee U.S. House racesTexas U.S. House racesUtah U.S. House racesVermont U.S. House raceVirginia U.S. House racesWashington U.S. House racesWest Virginia U.S. House racesWisconsin U.S. House racesWyoming U.S. House raceSubmit

The U.S. House of Representatives election in South Dakota is scheduled on November 3, 2026. Voters will elect one candidate to serve in the U.S. House from the state's one at-large U.S. House district. The primary is June 2, 2026. The filing deadline is March 31, 2026.

Candidate filing deadline	Primary election	General election
March 31, 2026	June 2, 2026	November 3, 2026

A primary election is an election in which registered voters select a candidate that they believe should be a political party's candidate for elected office to run in the general election. They are also used to choose convention delegates and party leaders. Primaries are state-level and local-level elections that take place prior to a general election. South Dakota law allows parties to choose whether to let unaffiliated voters vote in their elections. For more information on recognized political parties in South Dakota and their primary policies, see here.

For information about which offices are nominated via primary election, see this article.

This is one of 51 open races for the U.S. House of Representatives this year in which an incumbent is not running for re-election. Across the country, 21 Democrats and 30 Republicans are not running for re-election. In 2024, 45 incumbents — 24 Democrats and 21 Republicans — did not seek re-election.

This page focuses on South Dakota's Democratic primary for the U.S. House. For more in-depth information on the state's Republican primary and the general election, see the following pages:

• United States House election in South Dakota, 2026 (June 2 Republican primary)
• United States House of Representatives election in South Dakota, 2026

Candidates and election results

Note: The following list includes official candidates only. Ballotpedia defines official candidates as people who:

• Register with a federal or state campaign finance agency before the candidate filing deadline
• Appear on candidate lists released by government election agencies
  

Democratic primary election

Democratic primary for U.S. House South Dakota At-large District

Nicole Gronli, Billy Mawhiney, and Scott Schlagel are running in the Democratic primary for U.S. House South Dakota At-large District on June 2, 2026.

		Candidate
		Nicole Gronli
	Submit photo	Billy Mawhiney
	Submit photo	Scott Schlagel

---

	There are no incumbents in this race.
= candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.
Do you want a spreadsheet of this type of data? Contact our sales team.

Candidate profiles

There are currently no candidate profiles created for this race. Candidate profiles will appear here as they are created. Encourage the candidates in this race to complete Ballotpedia's Candidate Connection survey so that their profile will appear here. You can ask candidates in this race to fill out the survey by clicking their names below:

• Billy Mawhiney

Voting information

See also: Voting in South Dakota

Election information in South Dakota: June 2, 2026, election.

What is the voter registration deadline?

• In-person: May 18, 2026
• By mail: Received by May 18, 2026
• Online: N/A

Is absentee/mail-in voting available to all voters?

N/A

What is the absentee/mail-in ballot request deadline?

• In-person: June 1, 2026
• By mail: Received by June 1, 2026
• Online: N/A

What is the absentee/mail-in ballot return deadline?

• In-person: June 2, 2026
• By mail: Received by June 2, 2026

Is early voting available to all voters?

Yes

What are the early voting start and end dates?

April 17, 2026 to June 1, 2026

Are all voters required to present ID at the polls? If so, is a photo or non-photo ID required?

N/A

When are polls open on Election Day?

7:00 a.m. - 7:00 p.m. (CT/MT)

Campaign finance

Name	Party	Receipts*	Disbursements**	Cash on hand	Date
Nicole Gronli	Democratic Party	$93,277	$37,738	$55,539	As of December 31, 2025
Billy Mawhiney	Democratic Party	$28,164	$20,322	$7,842	As of December 31, 2025
Scott Schlagel	Democratic Party	$0	$0	$0	Data not available***
Source: Federal Elections Commission, "Campaign finance data," 2026. This product uses the openFEC API but is not endorsed or certified by the Federal Election Commission (FEC). * According to the FEC, "Receipts are anything of value (money, goods, services or property) received by a political committee." ** According to the FEC, a disbursement "is a purchase, payment, distribution, loan, advance, deposit or gift of money or anything of value to influence a federal election," plus other kinds of payments not made to influence a federal election. *** Candidate either did not report any receipts or disbursements to the FEC, or Ballotpedia did not find an FEC candidate ID.

Ballot access

The table below details filing requirements for U.S. House candidates in South Dakota in the 2026 election cycle. For additional information on candidate ballot access requirements in South Dakota, click here.

Filing requirements for U.S. House candidates, 2026
State	Office	Party	Signatures required	Filing fee	Filing deadline	Source
South Dakota	U.S. House	Democratic	1,232	N/A	3/31/2026	Source
South Dakota	U.S. House	Libertarian	741	N/A	3/31/2026	Source
South Dakota	U.S. House	Republican	2,171	N/A	3/31/2026	Source
South Dakota	U.S. House	Unaffiliated	3,502	N/A	4/28/2026	Source

See also

• United States House election in South Dakota, 2026 (June 2 Republican primary)
• United States House of Representatives election in South Dakota, 2026
• United States House Democratic Party primaries, 2026
• United States House of Representatives elections, 2026
• U.S. House battlegrounds, 2026

Footnotes

2025-2026 Elections to the United States Congress

Senate by State

Alabama • Alaska • Arkansas • Colorado • Delaware • Florida (special) • Georgia • Idaho • Illinois • Iowa • Kansas • Kentucky • Louisiana • Maine • Massachusetts • Michigan • Minnesota • Mississippi • Montana • Nebraska • New Hampshire • New Jersey • New Mexico • North Carolina • Ohio (special) • Oklahoma • Oregon • Rhode Island • South Carolina • South Dakota • Tennessee • Texas • Virginia • West Virginia • Wyoming

---

House by State

Alabama • Alaska • American Samoa • Arizona • Arkansas • California • Colorado • Connecticut • Delaware • Florida • Georgia • Guam • Hawaii • Idaho • Illinois • Indiana • Iowa • Kansas • Kentucky • Louisiana • Maine • Maryland • Massachusetts • Michigan • Minnesota • Mississippi • Missouri • Montana • Nebraska • Nevada • New Hampshire • New Jersey • New Mexico • New York • North Carolina • North Dakota • Northern Mariana Islands • Ohio • Oklahoma • Oregon • Pennsylvania • Rhode Island • South Carolina • South Dakota • Tennessee • Texas • U.S. Virgin Islands • Utah • Vermont • Virginia • Washington • West Virginia • Wisconsin • Wyoming

---

Election information

Ballot access for major and minor party candidates • List of candidates running for election • List of congressional challengers • Retiring senators • Retiring representatives

---

Super PACs/Organizations

American Bridge 21st Century • American Crossroads • American Unity PAC • Campaign for Primary Accountability • Club for Growth Action • Congressional Leadership Fund • Cooperative of American Physicians IE Committee• Crossroads Generation • Ending Spending Action Fund • Endorse Liberty • Fair Share Action • FreedomWorks for America • Government Integrity Fund • House Majority PAC • Independence USA Fund • League of Conservation Voters • Liberty for All PAC • Majority PAC • National Association of Realtors • NEA Advocacy Fund • Now or Never PAC • Planned Parenthood Votes • Ready for Hillary • Republicans for a Prosperous America • Restore America's Voice PAC • SEIU Pea-Federal • Women Vote!

Ballotpedia

About

Overview • What people are saying • Support Ballotpedia • Contact • Contribute • Job opportunities

---

Executive: Leslie Graves, Founder and CEO • Gwen Beattie, Chief Operating Officer

Communications: Alison Graves, Director of Communications • Carley Allensworth • Abigail Campbell • Sarah Groat • Nathaniel Harwood • Dillon Redmond
External Relations: Geoff Pallay, Director of External Relations • Ken Carbullido, Vice President of Election Product and Technology Strategy • Ashley Fleming • Thomas Mardik • Hannah Nelson
Operations: Meghann Olshefski, Director of Operations • Amanda Herbert • Mandy Morris • Caroline Presnell • Kelly Rindfleisch
Tech: Matt Latourelle, Director of Technology Operations • Ryan Burch • Kirsten Corrao • Beth Dellea • Travis Eden • Tate Kamish • Margaret Kearney • Eric Lotto • Joseph Sanchez • Mary Susmitha

Contributors: Scott Rasmussen

---

Editorial Content

Josh Altic, Director of Content • Daniel Anderson, Associate Director of Elections & Data • Cory Eucalitto, Associate Director of Features • Ryan Byrne, Managing Editor of Ballot Measures • Mandy McConnell, Managing Editor of News • Doug Kronaizl, Managing Editor of Local Expansion • Abbey Smith, Managing Editor of Elections • Janie Valentine, Managing Editor of Law • Joel Williams, Managing Editor of Events • Joseph Greaney, Managing Editor of Policy • Andrew Bahl • Jaclyn Beran • Marielle Bricker • Joseph Brusgard • Emma Burlingame • Kelly Coyle • Jon Dunn • Victoria Edwards • Thomas Ellis • Nicole Fisher • Thomas Grobben • Brianna Hosea • Molly Kehoe • Tyler King • Glorie Martinez • Norm Leahy, Senior Editor • Nathan Maxwell • Brandon McCauley • Andrew McNair • Ellie Mikus • Mackenzie Murphy • Kaley Platek • Samantha Post • Adam Powell • Annelise Reinwald • Spencer Richardson • Victoria Rose • Briana Ryan • Myj Saintyl • Maddy Salucka • Emma Soukup • Alexis Thacker • Mina Vogel • Samuel Wonacott • Trenton Woodcox

[show]

South Dakota's current delegation to the United States Congress

Senators

Mike Rounds (R)

John Thune (R)

Representatives

Dusty Johnson (R)

Republican Party (3)