Why it Matters

The Republican who wins tomorrow's South Dakota gubernatorial primary 2026 will almost certainly become the state's next governor. In a state Donald Trump carried by 26 points in 2024, the general election is a formality. The real contest is playing out right now in Pierre, Sioux Falls, and the ranch country of western South Dakota, where four Republicans are competing to succeed Kristi Noem.

The answer to who's winning starts with the money. And the money tells a story about what South Dakota's business establishment wants, who it fears, and what kind of Republican it's willing to pay to put in the governor's mansion.

The Field

Dusty Johnson is the odds-on favorite heading into primary day. The at-large U.S. Representative has served in Congress since 2019, sits on the House Agriculture Committee and the House Transportation and Infrastructure Committee, and chairs the Subcommittee on Commodity Markets, Digital Assets, and Rural Development. Before Congress, he served on the South Dakota Public Utilities Commission and as chief of staff to Governor Dennis Daugaard, a resume that makes him the most credentialed executive candidate in the field. He announced his gubernatorial bid in June 2025, framing himself as a pragmatic problem-solver who would focus on property taxes, public health, and the state's lagging education outcomes.

Larry Rhoden is the incumbent, though not by election. The west river rancher and former state legislator ascended to the governorship when Noem departed for Washington to lead the Department of Homeland Security. He's running on his record and his deep rural roots, but he's polling well below where an incumbent should be, stuck around 17 to 19 percent, and has been battered by attack ads targeting a tax swap he signed that lowered property taxes while raising sales taxes. His frustration has boiled over publicly; he accused a rival of "willfully, intentionally, and maliciously" lying to voters, a charge widely understood to be directed at Johnson.

Toby Doeden is the wild card. The Aberdeen businessman has never held elected office, entered the race as an explicit outsider, and has surged to roughly 26 percent in the latest Emerson College/KELOLAND survey, leading among voters 70 and older. His pitch is straightforward anti-establishment populism: he is running, he says, "for the people who built this state, NOT the powerful few who control it." He is financing his own campaign almost entirely from personal funds.

Jon Hansen is the Speaker of the South Dakota House of Representatives and the most ideologically committed conservative in the field. His campaign is built around the slogan "Faith. Family. Freedom." and targets evangelical primary voters and the hard-right flank of the GOP. He's been polling in fourth place and struggling for oxygen in a crowded race.

Race Funding

Johnson has raised approximately $3.7 million for his gubernatorial campaign, and the bulk of it came from a single source: a $3 million transfer from his congressional political action committee, Friends of Dusty Johnson (FEC ID: C00628917). Years of federal fundraising converted into state campaign cash. His separate "Dusty PAC" state committee held an additional $1.19 million heading into the final stretch, giving him a total financial apparatus that dwarfs the rest of the field.

Rhoden raised approximately $572,000 between January and mid-May 2026, while spending $914,000. He entered primary week with roughly $170,000 in cash on hand, running a deficit campaign against a better-funded opponent.

Hansen raised about $355,000 total, with approximately $164,000 remaining. His small-dollar donor base mirrors Rhoden's: both received around $18,000 in unitemized contributions in the final pre-primary period.

Then there's Doeden. He raised almost nothing from outside donors (just $806 in unitemized contributions in the final filing period), but has loaned his own campaign more than $4 million. He spent approximately $1.4 million on advertising and paid his staff $210,000, the highest payroll of any candidate in the race. He bets that personal wealth can substitute for a political network.

Across all four candidates, more than $11 million has been raised and approximately $10 million spent in the South Dakota Republican primary 2026, which is an extraordinary sum for a state with fewer than a million residents.

Who Is Buying

The most revealing money in this race is in the PACs.

Republican Forward is a federally registered super PAC that raised approximately $3 million from South Dakota's business community and funneled $1.4 million to a state-registered entity called Rushmore Principles PAC, which then spent roughly $1.2 million on digital advertising and direct mail opposing Larry Rhoden. The donor list reads like a directory of Sioux Falls corporate power:

  • POET Ethanol: $500,000
  • Dana Dykhouse (Chairman and CEO of First Premier Bank): $300,000
  • Matthew Paulson (founder and CEO of MarketBeat): $150,000
  • Lloyd Companies: $100,000
  • Members of the Burwell Enterprises family: a significant additional sum

These donors are business interests (ethanol, banking, real estate, and financial media) who have made a calculated decision that Johnson is their candidate and Rhoden is not. The ethanol industry's $500,000 commitment from POET is particularly significant: Johnson chairs the subcommittee with jurisdiction over commodity markets and rural development, and has been a consistent advocate for biofuels and agricultural trade policy throughout his congressional tenure. His communications data shows agriculture ranking as his fourth most-frequent issue area across 1,730 public communications.

Defend US PAC, a Virginia-based federal committee, has been running ads in the opposite direction and framing Johnson as insufficiently conservative. Its funding trail is murky: during the first quarter of 2026, it received $95,000 from the Affordable Energy Fund PAC, which itself was funded by other PACs. The ultimate source of that money remains unclear.

Dakota First Action, a small pro-Doeden committee, raised just $6,600 and spent around $10,600. It's a minor player, but one that signals at least some organized outside interest in the businessman's candidacy.

What South Dakota Wants

South Dakota is an agricultural state with a rural broadband problem, a prison recidivism problem, and a property tax debate that has defined this primary. Its congressional delegation has historically been expected to fight for farm policy, protect public lands, and keep federal spending from crushing rural communities.

Johnson's record maps closely onto those priorities. He sits on both the House Agriculture Committee and the House Transportation and Infrastructure Committee. He chairs the subcommittee overseeing commodity markets, digital assets, and rural development, giving him influence over cryptocurrency regulation, crop insurance, and rural infrastructure simultaneously. He has cosponsored 110 Republican bills and 16 Democratic ones, a bipartisan ratio that reflects his Problem Solvers Caucus membership and his willingness to cut deals across the aisle when South Dakota's interests demand it.

His most significant legislative achievement in the transportation space came with the Ocean Shipping Reform Act, signed by President Biden in 2022: a bipartisan bill co-sponsored with Democratic Rep. John Garamendi of California that targeted foreign carrier dominance of U.S. shipping routes. A follow-up bill targeting China's influence over global trade passed the House in 2024.

He has also been a persistent voice on government dysfunction: he introduced the Eliminate Shutdowns Act during the October 2025 federal government closure and called shutdowns "stupid" on NPR. His communications data shows defense and public lands as his top two issue areas, followed by government operations and agriculture, a portfolio that aligns with what South Dakota's business community and agricultural sector need from a federal representative, and presumably from a governor.

The 35 Percent Problem

South Dakota has a threshold rule that could scramble everything: if no candidate wins more than 35 percent of the primary vote, the top two advance to a runoff on July 28, 2026. With four candidates splitting a deeply divided electorate, a runoff is a serious possibility.

Johnson has led in most polls but has been sliding: he dropped from 28 percent to 23 percent in the most recent Emerson survey as Doeden surged. Rhoden is stuck below 20 percent. Hansen is fighting for relevance. No candidate is clearly on track to clear the threshold.

If the race goes to a runoff, the dynamics shift considerably. Johnson's financial advantage and organizational infrastructure would likely make him the favorite in a head-to-head race. But a Doeden surge, fueled by his own millions and the anti-establishment energy that has powered outsider candidates across the country, cannot be dismissed.

The Stakes

The eventual winner of the South Dakota Republican primary 2026 will face Democrat Dan Ahlers in November in a race that is not considered competitive. South Dakota is among the most reliably Republican states in the nation, and the governorship has been held by Republicans for decades.

What's actually at stake is the character of Republican governance in a state where agriculture, energy, and rural economic development hang in the balance. The business community has made its choice and spent $3 million saying so. Whether South Dakota's Republican primary voters agree with that choice, or whether they hand the nomination to an outsider self-funder or a hard-right legislator, will be answered when the polls close tomorrow night.