Who Will Win South Dakota’s Senate Seat
South Dakota’s Senate seat is up for grabs, with the state’s next contest determining who represents it in Washington. South Dakota has long leaned solidly Republican in federal races, making the general election outcome closely tied to the GOP primary. Candidates from both parties are expected to emerge as the race takes shape.
Why Markets Are Watching
Senate control shapes national policy on taxes, agriculture, energy, and judicial appointments, and every seat matters in a chamber often decided by narrow margins. South Dakota’s rural, agriculture-driven economy and its role in shaping farm and trade policy give the race added significance beyond the state’s borders. A shift in this seat could influence broader Senate dynamics heading into 2029.
How Prediction Markets Frame the Race
The market reduces a sprawling field of potential candidates into a single tradeable question: which party, or which individual, ultimately claims the seat. By breaking out specific names alongside broader partisan outcomes, it captures both the primary jockeying and the general election contest in one framework. Traders are effectively weighing candidate strength against the state’s entrenched partisan lean.
Related terms
Total Volume
$1.7m
Kalshi $1.4k · Polymarket $1.7m
Leading Market
Mike Rounds
Kalshi 96% · Polymarket 95%
Mike Rounds Volume
$353.9k
Kalshi $397.25 · Polymarket $353.5k
Mike Rounds 24h Change
-1.00%
Kalshi 0.00% · Polymarket -1.00%
Calculate Your Potential Return
- Kalshi(opens in a new tab) 7.0% fee
- Polymarket(opens in a new tab) 5.0% fee
| Market | Kalshi Yes | Kalshi Fee | Kalshi Payout | Polymarket Yes | Polymarket Fee | Polymarket Payout |
|---|---|---|---|---|---|---|
| Mike RoundsRepublican Party | 92.5¢ | 7.0% |
|
95.0¢ | 5% |
|
| Democratic Party | 12.0¢ | 7.0% |
|
— | — | — |
| Brian Bengs | — | — | — | 5.0¢ | 5% |
|
* Estimates if candidate wins. Actual returns may vary.
All Markets
Emerging News
Elections
Iowa emerges as surprise 2026 midterm battleground
PN Team • 3 weeks ago
Iowa, which has voted reliably Republican for over a decade and backed Donald Trump three times, is shaping up as an unexpectedly competitive battleground in the 2026 midterms. Democrats see real chances to flip the governorship, a Senate seat, and several House races, aided by a large bloc of independent voters and a state economy strained by tariffs on agricultural goods, rising diesel prices tied to the Iran conflict, and rural hospital closures linked to Medicaid cuts. Polling shows a majority of Iowans disapprove of Trump and believe his policies have raised living costs.
Republican Sen. Joni Ernst's retirement opens a competitive Senate race between Rep. Ashley Hinson and Democrat Josh Turek, a former Paralympic gold medalist. In a recent debate, Hinson repeatedly attacked Turek's attendance record in the Iowa legislature, including missed votes on the state farm bill and rural health funding, and demanded he refund per diem payments; Turek countered by criticizing her lack of in-person town halls. In the governor's race, Democratic State Auditor Rob Sand is pitching an economic-populist message against Republican Zach Lahn, who has faced questions over his Iowa residency. Analysts note Iowa's history of razor-thin House margins, making it a key test of whether Democrats can reclaim congressional control.
Sources:
Sentiment
- Donald Trump Trump is portrayed negatively with majority disapproval and blame for rising living costs.
- Ashley Hinson Hinson is shown attacking her opponent aggressively and facing criticism over lack of town halls.
- Democratic Party (United States) Democrats are portrayed as having strong opportunities to flip seats in Iowa, a favorable framing.
- Republican Party (United States) Republicans are portrayed as facing a surprisingly competitive battleground due to unpopular policies and economic strain.
- Iowa Iowa is the central focus as an emerging competitive battleground, a largely neutral-to-positive political development.
- Iran Iran is mentioned as a source of economic strain via diesel prices tied to conflict.
- Independent politician Independent voters are noted as a key bloc influencing the race, a neutral factual mention.
- United States The United States is mentioned contextually regarding national politics and midterms.
- United States Congress Congress is mentioned factually regarding House control stakes without specific portrayal.
- United States Senate The Senate is referenced factually as the seat up for competition.
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Elections
South Dakota Voters to Decide Fate of Medicaid Expansion in November
PN Team • 4 weeks ago
South Dakota's Constitutional Amendment I, on the November ballot, would repeal the state's Medicaid expansion if federal funding drops below the current 90-percent matching threshold. Voters approved Medicaid expansion in 2022 with 56 percent support, and lawmakers placed Amendment I before voters during this year's legislative session.
Supporters, including Republican State Senator Casey Crabtree, argue the state cannot absorb costs if Washington reduces its share, though he notes expansion could continue under state statute if lawmakers find funding. Opponents, including medical professionals and advocacy groups like the American Cancer Society Cancer Action Network, warn as many as 30,000 South Dakotans could lose coverage, calling the program critical in rural areas. Both sides acknowledge that any federal rollback of Medicaid's funding formula would face a difficult path through Congress, given that 40 states now rely on expansion dollars. Separately, other states are already seeing coverage losses tied to federal policy changes: Washington state expects about 14,000 residents, mostly lawfully present immigrants without green cards, to lose Medicaid eligibility starting October 1 under the new federal law known as HR1. The South Dakota vote will test public appetite for conditional entitlement guarantees tied to federal funding levels.
Sources:
Sentiment
- Washington (state) Washington state is portrayed negatively as facing coverage losses for thousands of immigrant residents due to federal policy changes.
- Republican Party (United States) A Republican state senator is cited supporting the amendment, but the party itself is only tangentially referenced.
- South Dakota South Dakota is the central subject of a balanced policy debate over Medicaid expansion with no clear reputational gain or harm.
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Elections
Iowa GOP Senate Candidate Hinson Navigates Trump Tightrope
PN Team • 4 weeks ago
Republican Ashley Hinson is locked in a competitive Iowa U.S. Senate race against Democrat Josh Turek, and GOP strategists acknowledge she faces a delicate balancing act with Donald Trump. Hinson has sought to create modest distance from the president on select issues without openly breaking with him or risking backlash from his base, which remains influential in Iowa's Republican electorate.
The dynamic reflects broader concerns within the GOP about how closely Senate candidates in competitive states should align themselves with Trump heading into the midterms. Turek, the Democratic challenger, is positioning himself to capitalize on any erosion of Republican support tied to dissatisfaction with Trump-era policies or rhetoric. The race is being watched as a bellwether for how Republican incumbents and candidates elsewhere manage similar tensions between base loyalty and swing-voter appeal, with implications for control of the Senate.
Sources:
Sentiment
- Donald Trump Trump is framed as a political liability candidates must carefully distance themselves from without alienating his base.
- Ashley Hinson Hinson is depicted as navigating a precarious political balancing act, suggesting vulnerability and strategic difficulty.
- Democratic Party (United States) Democratic challenger Turek is portrayed as strategically positioned to gain from GOP tensions, a mildly favorable framing.
- Republican Party (United States) The party is depicted as internally anxious about how candidates should handle association with Trump, a mildly unfavorable framing.
- Iowa Iowa is mentioned as the race's location without specific reputational framing.
- United States Senate Mentioned factually as the body whose control is at stake in the midterms.
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Elections
Alaska Senate Race Fundraising Record Clouded by DOJ Ballot Lawsuit
PN Team • 7 days ago
Alaska's record-breaking Senate race between Democrat Mary Peltola and Republican incumbent Sen. Dan Sullivan has taken a new turn as the Justice Department filed a lawsuit seeking to block certification of results if anyone other than Sullivan wins. The DOJ argues a same-named candidate, Daniel J. Sullivan Jr., could confuse the outcome, though the ballot lists the senator's party and incumbent status. Peltola called the suit a "desperate attempt" to cling to power; election integrity advocates and Democratic leaders, including Sen. Chuck Schumer, condemned it as an unprecedented intervention. The lawsuit adds legal uncertainty to a contest already defined by record spending and viewed as pivotal to Senate control.
Peltola has outraised Sullivan roughly $32 million to $13 million since January, with outside groups adding over $80 million more, as early voting continues ahead of the ranked-choice general election.
Sources:
Sentiment
- Mary Peltola Depicted as a strong fundraiser pushing back forcefully against what she calls a desperate legal maneuver.
- Dan Sullivan (U.S. senator) DOJ lawsuit appears designed to protect his seat, raising questions about fairness despite his incumbency.
- Chuck Schumer Portrayed as a Democratic leader condemning the lawsuit as improper interference.
- Republican Party (United States) Party of Sullivan, tied to a controversial DOJ lawsuit seen as favoring him.
- Democratic Party (United States) Mentioned as Peltola's party amid a contested, high-stakes Senate race.
- Alaska Setting of the contested, high-spending Senate race described factually.
- United States Senate Referenced as the chamber whose control is at stake in this contested race.
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Congress
Senate departs for midterm recess as Schumer predicts Democratic Senate takeover
PN Team • 4 weeks ago
The Senate adjourned for a five-week recess until after the midterm elections, with Senate Minority Leader Chuck Schumer expressing confidence Democrats will retake the majority, citing strong candidates and a favorable political climate. Senate Majority Leader John Thune said Republicans still expect to hold their majority, though likely narrower, given the map favors states Trump carried previously. Democratic strategists remain split between targeting flippable states like Alaska, Ohio, and Iowa versus reach states such as Mississippi and Florida. Separately, Cook Political Report shifted its Florida and Texas governor's races toward Democrats, now rating both Lean Republican rather than safer categories, citing Trump's weak approval ratings and a difficult midterm environment for the GOP, though Republicans remain favored in both pricey, traditionally red states.
Other developments: a bipartisan Senate permitting reform deal faces resistance in the House, where Democrats say they'd rather wait until after the election to negotiate from a stronger position. House Judiciary's Jamie Raskin asked federal watchdogs to probe taxpayer-funded Trump administration TV ads ahead of the midterms. Schumer also said he'll push AI safety legislation next year, with some Republican support, while Third Way unveiled a Supreme Court reform platform featuring 18-year term limits and an ethics code, aiming to shape Democratic discourse through 2028.
Sources:
Sentiment
- Democratic Party (United States) Democrats are portrayed with a favorable political climate and growing confidence of retaking the Senate majority.
- Donald Trump Trump is cited as having weak approval ratings contributing to GOP's difficult midterm environment, and his administration faces scrutiny over taxpayer-funded ads.
- Chuck Schumer Schumer is portrayed confidently predicting a Democratic takeover and pushing future legislation, a favorable depiction.
- Republican Party (United States) Republicans are described as facing a difficult midterm environment and narrowing majority prospects due to Trump's weak approval.
- Jamie Raskin Raskin is shown proactively seeking accountability over taxpayer-funded political ads, a favorable watchdog action.
- Florida Florida's governor race is shifted toward Democrats due to a tougher GOP environment, a mildly unfavorable signal for Republicans there.
- John Thune Thune is quoted expressing confidence Republicans will hold their majority, a neutral-to-mildly favorable mention.
- Texas Texas's governor race is shifted toward Democrats, slightly unfavorable for the GOP's standing there.
- Alaska Alaska is mentioned neutrally as a flippable target state for Democrats.
- Iowa Iowa is mentioned neutrally as a potential flip target.
- Mississippi Mississippi is mentioned neutrally as a reach state for Democrats.
- Ohio Ohio is mentioned neutrally as a flippable target state.
- United States Senate The Senate is described factually as adjourning for recess and debating legislation, a neutral institutional mention.
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Elections
Florida Senate Race: Moody vs. Nixon Enters Final Stretch
PN Team • 1 week ago
With the midterm election days away, Florida's U.S. Senate race pits Republican incumbent Ashley Moody, appointed to the seat by Gov. Ron DeSantis, against Democratic state Rep. Angie Nixon, who upset Alex Vindman in the August primary. Moody is campaigning on her record as a former attorney general and prosecutor, emphasizing law enforcement, individual freedoms, and Florida's conservative policies while casting Nixon as a socialist. Nixon is focused on affordability, government corruption, and working families, accusing Moody of using office for personal enrichment. Both candidates reject the other's characterizations as the race heads into its final week before November's vote.
Sources:
Sentiment
- Ashley Moody Accused of personal enrichment and corruption by her opponent, despite touting her record.
- Angie Nixon Accused by opponent of socialism while herself accusing Moody of corruption, a contested portrayal.
- Democratic Party (United States) Mentioned as Nixon's party amid Moody's socialist framing, a mild partisan jab.
- Republican Party (United States) Referenced as Moody's party in a contentious, balanced campaign dispute.
- Florida Setting of the Senate race, mentioned factually without evaluative framing.
- United States Senate The Senate seat itself is the contested office, described factually.
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Elections
El-Sayed faces renewed scrutiny over Israel comments and Muslim Brotherhood ties ahead of Michigan Senate debate
PN Team • 1 week ago
Michigan Democratic Senate nominee Abdul El-Sayed has repeated his assertion that Israel is "not actually our friend," making the case in interviews with ABC News and MS NOW ahead of his final debate against Republican Mike Rogers. El-Sayed argues Israel has lobbied the U.S. into conflicts, including pushing for action against Iran, and accused the Israeli military of war crimes. He has also faced criticism for deflecting questions about alleged family ties to the Muslim Brotherhood and past appearances with controversial streamer Hasan Piker. At the debate in Detroit, El-Sayed also opposed the SAVE America Act's voter ID and citizenship-proof requirements, calling them voter suppression, while Rogers defended the measure as reasonable. The race remains competitive ahead of the Nov. 3 election.
Sources:
Sentiment
- Abdul El-Sayed El-Sayed faces renewed scrutiny over controversial Israel comments, alleged Muslim Brotherhood ties, and associations with a controversial streamer, casting him in a negative light.
- Israel Israel is portrayed negatively through El-Sayed's accusations of war crimes and manipulating U.S. foreign policy.
- Mike Rogers (Michigan politician) Rogers is portrayed positively as defending a reasonable policy stance in contrast to El-Sayed's criticisms.
- Democratic Party (United States) El-Sayed, the Democratic nominee, is embroiled in controversy over Israel comments and Muslim Brotherhood ties, reflecting mildly on the party.
- Iran Iran is mentioned only as part of El-Sayed's claim about Israel pushing for U.S. action against it.
- Republican Party (United States) Republican candidate Rogers is portrayed as defending a policy position reasonably against El-Sayed's criticism.
- United States The United States is mentioned as the entity Israel allegedly lobbies, without a clear reputational framing.
- Detroit Detroit is mentioned simply as the location of the debate.
- Michigan Michigan is mentioned as the location of the Senate race without specific reputational framing.
- United States Senate The U.S. Senate is referenced only as the context for the race, with no direct reputational framing.
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International
Trump-Xi summit yields trade, coal and anti-drug agreements
PN Team • 4 weeks ago
The Sept. 23-25 state visit of Chinese President Xi Jinping to Washington produced several concrete agreements, following up on momentum from President Trump's May visit to China. The two countries launched the U.S.-China Board of Trade and Board of Investment, bodies agreed upon in May, and announced tariff relief on $30 billion worth of non-sensitive goods in each direction. A new working group will target barriers in agriculture and other sectors, while China committed to importing at least 10 million metric tons of U.S. coal annually in 2027 and 2028.
On counternarcotics, China agreed to restrict a class of dangerous drugs and limit exports of fentanyl precursor chemicals, building on law enforcement cooperation that led to drug-trafficking arrests of Chinese nationals in August. No joint military statement was issued, though China's Foreign Ministry said both militaries agreed to prioritize a new crisis-communication mechanism. Unlike in May, Trump indicated Taiwan was not a major topic this time, even as tensions and Chinese military activity near the island continue.
Sources:
Sentiment
- Donald Trump Trump's summit diplomacy produced concrete trade, coal, and anti-drug agreements, reflecting positively on his foreign policy efforts.
- Xi Jinping Xi's state visit resulted in substantive agreements on trade, coal imports, and counternarcotics cooperation, portraying constructive diplomatic engagement.
- United States The U.S. benefits from new trade bodies, tariff relief, and coal export commitments resulting from the summit.
- Washington, D.C. Washington is mentioned simply as the location of the state visit, a neutral factual reference.
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Elections
Husted touts tax cuts in RNC speech as he campaigns against Brown for Ohio Senate seat
PN Team • 2 months ago
Ohio Sen. Jon Husted addressed the Republican National Convention in Dallas, one of several speakers on the event's first night alongside House Majority Leader Steve Scalise and Senate Majority Whip John Barrasso. The two-day convention, headlined by President Donald Trump and Vice President JD Vance, comes less than two months before the November midterms.
Husted centered his remarks on affordability, citing conversations with Ohioans he says have benefited from tax cuts signed into law last year, including provisions eliminating taxes on tips, overtime pay, and Social Security income. He pointed to workers in Cleveland, Findlay, and Dayton as examples of people using the savings to pay down debt, save for a home, or stay in their houses as they age.
Husted is running to keep his Senate seat against Democrat Sherrod Brown, the former senator who lost to Bernie Moreno in 2024 and is seeking a return to Washington. Brown has recently campaigned in the Cleveland and Canton areas. Election Day is November 3.
Sources:
Sentiment
- Sherrod Brown Brown is framed as a past election loser now seeking a comeback, a mildly unfavorable framing.
- Donald Trump Trump is mentioned as headlining the convention, a factual and mildly favorable association.
- Republican Party (United States) The Republican Party is referenced as the political affiliation of the speakers at the convention.
- Ohio Ohio is the setting for the Senate race and tax cut examples, mentioned neutrally.
- United States Senate The Senate seat is the subject of the race but mentioned neutrally.
- Dallas Dallas is mentioned only as the location of the convention.
- Washington, D.C. Washington, D.C. is mentioned only as the destination Brown seeks to return to.
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Elections
Ken Paxton Vents Over Lack of Control in Texas Senate Race as GOP Rifts Widen
PN Team • 4 weeks ago
Texas Attorney General and GOP Senate nominee Ken Paxton has been caught on leaked audio complaining that Washington operatives and party leaders, rather than himself, are controlling his campaign's messaging. "I've never been in a race where I felt less control," Paxton said at a fundraiser, adding frustration that decisions were coming "from DC." His campaign says he was referring to super PACs, which cannot legally coordinate with campaigns but have spent heavily on his behalf. A separate leaked recording had Paxton acknowledging his numbers dropped after a Trump-headlined GOP convention in Dallas.
The disclosures add to visible strain within Texas Republican ranks ahead of the November 3 election against Democrat James Talarico, with Senator John Cornyn among those reluctant to fully rally behind Paxton. Angela Paxton, the AG's estranged wife who filed for divorce in July 2025 citing adultery, has released a PAC-funded ad urging Republicans to back the full GOP ticket regardless of individual candidates. Polling shows Talarico with a narrow lead, and Republicans have poured tens of millions of dollars into defending the seat.
Sources:
Sentiment
- Ken Paxton Paxton is shown venting about lack of control, declining poll numbers, and marital scandal, all reputationally damaging.
- Republican Party (United States) The article depicts visible internal strain and reluctance among Republicans to rally behind their own nominee.
- Democratic Party (United States) Democratic nominee Talarico is noted leading in polls, a mildly favorable mention for the party.
- Texas Senate The Texas Senate race is portrayed as contentious and strained without directly assigning blame to the institution.
- Washington, D.C. Washington, D.C. is cited as the source of outside political control resented by Paxton, a mildly negative association.
- Texas Texas is the setting of the contested race, mentioned factually without strong reputational charge.
- United States Senate Mentioned factually as the office being contested without specific reputational framing.
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South Dakota Senate Race: Margin of Victory
Leading:
90%
Rounds, 3+ pts
Vol $70.43
Nebraska Senate 2026: Who Will Win the Seat
Leading:
68.5%
Pete Ricketts
Vol $1m
Wisconsin’s 1st District House Seat: Who Will Win?
Leading:
49.5%
Mitchell Berman
Vol $2.7k
South Dakota Senate winner?
Leading:
94.5%
Mike Rounds
Vol $353.5k
South Dakota Senate Election: Voter Turnout Thresholds
Leading:
97.5%
Above 250K
Vol $343.86
South Dakota Governor Race: Margin of Victory
Leading:
75%
Rhoden, 12+ pts
Vol $1.1k
South Dakota Governor Race: Which Party Wins in 2026
Leading:
97.5%
Larry Rhoden
Vol $117.6k
South Dakota At-Large House Seat: 2026 Winner
Leading:
96.5%
Marty Jackley
Vol $23.3k