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Races · Senate · 2022 · South Dakota
Senate · class III · open seat

Brian Bengs vs John Thune

Safe RR +37.2 forecast· 6 polls · 0 markets
Model's final pre-election call · win probabilitypoliagg-v34 · final pre-election call
1% Bengs (D)
99% Thune (R)
R+15R+5TIEDD+5D+15
Model's predicted final margin R +37.2 · 80% CI R+49.2 → R+25.2
Actual result R+43.5 · backtest (race already called)
Momentum
insufficient data
Tipping-point P
0.0%
Decisive for chamber control
Market · D-side
Cross-platform consensus
News articles · 30d
no recent coverage
Where this race stands
Verified

Safe R · model 99% R

No recent polls or markets for this race. PVI baseline (R+16) suggests Safe R.

The poliagg-v34 ensemble forecasts R+37.2 with an 80% CI ranging from R+49.2 (10th pctile) to R+25.2 (90th pctile), giving R a 99% chance of winning.

CITATIONS · safe-r
Forecast · poliagg-v34
Predicted final margin
R +37.2
80% CI: R +49.2R +25.2 · win prob 1%
R+60R+30TIEDD+30D+60
Quality · inputs
Data quality · medium
Polls used6
Days to electionpassed
Actual resultR+43.5
Residual σ6.00pt
Generated7/1/2026

Polling average

51015202530354045505560THUNE 56.5THUNE 51.8BENGS 28.8BENGS 27.5LESNAR 8.0SEP '22SEP '22OCT '22
Weighted, plus each pollster's measured bias subtracted before averaging.

All polls · 6 results

strongpositiveinfocautionflag
DatePollster · trust signalsn · popLeanBias · trackvs ratersD · R
Oct 19Emerson College+11,500 · unknownNEUTRALD +0.7118 tracked+0.8aligned
Oct 9South Dakota State University565 · RVNEUTRAL28 · 53
Oct 3South Dakota State University School of American and Global Studies565 · unknownNEUTRAL
Sep 10Lake Research Partners+2For · Politico400 · LVNEUTRAL+17.7noisy33 · 46
Sep 7Lake Research Partners400 · unknownNEUTRAL+17.7noisy
Mar 18Moore Information Group+2400 · LVR-LEANR +10.04 tracked-6.5r lean24 · 59

Endorsements · 3 total

Source · Wikipedia · 4 candidates with no endorsements yet
Thune · 100%3
RJohn Thune3 endorsers
Most notable · American Israel Public Affairs Committee
Other2
Organizations1
DEMBrian L. Bengs0 endorsers
no endorsers yet
No endorsements found yet. Endorsements come from the candidate's Wikipedia article (when one exists) and update with the daily scrape.
REPJohn R. Thune0 endorsers
no endorsers yet
No endorsements found yet. Endorsements come from the candidate's Wikipedia article (when one exists) and update with the daily scrape.
DBrian Bengs0 endorsers
no endorsers yet
No endorsements found yet. Endorsements come from the candidate's Wikipedia article (when one exists) and update with the daily scrape.
LTamara Lesnar0 endorsers
no endorsers yet
No endorsements found yet. Endorsements come from the candidate's Wikipedia article (when one exists) and update with the daily scrape.

Money raised · own committees

FEC Schedule E (independent expenditures) + candidate-committee totals · last filing 2022-10-28
John ThuneS2SD00068 ↗
Receipts
$7.5M
Disburse
$4.0M
Cash on hand
$16.9M
Debts
$0
Securities & investment$128.7K
Air transport$28.8K
TV / movies / music$23.9K
Electric utilities$23.0K
SANFORD HEALTH$67.5K
CAPITAL GROUP$37.9K
KKR$34.4K
DELTA AIR LINES$28.8K
GOLDMAN SACHS$27.1K
Brian BengsOWN COMMITTEE
Receipts
$498.0K
Disburse
$492.3K
Cash on hand
$5.7K
Debts
$20.0K
Education$1.8K
Lawyers / law firms$1.5K
K ROWE INVESTMENTS LLC$5.8K
SANFORD HEALTH$3.3K
SANFORD$3.1K
THE DASCHLE GROUP$2.9K
NOT-EMPLOYED$2.0K

Outside spending · independent expenditures

FEC Schedule E (independent expenditures) + candidate-committee totals · 24/48-hr IE reports
IE total
$209.3K
D side
$3.0K · 1%
R side
$206.4K · 99%
Top spender
AMERICAN ENERGY ACT…
For / against split
Against Thune $3.0K
For Thune $206.4K
SpenderSideAmountShareTarget
AMERICAN ENERGY ACTION FUNDR$204.0K97%for John Thune
REALLY AMERICAN PACD$3.0K1%against John Thune
NATIONAL RIFLE ASSOCIATION OF AMERICA POLITICAL VICTORY FUNDR$2.3K1%for John Thune
SOUTH DAKOTAN FOR POLITICAL INTEGRITYR$55.60%for John Thune

Editorial ratings · 6 raters

Cook · Sabato · Inside Elections · 538 · DDHQ et al.
Safe R6
The Cook Political Report
Safe R
Nov 18
DDHQ
Safe R
Jul 19
The Economist
Safe R
Sep 6
538
Safe R
Jun 29
Inside Elections
Safe R
Jan 6
Sabato's Crystal Ball
Safe R
Nov 2

Demographic crosstabs

age · education · race · gender
No demographic crosstabs published for this race yet. Most pollsters release only topline numbers; subgroup breakdowns (age, education, race, gender) appear here when a pollster publishes them.
Rating timeline
May 11, 2026Safe Rmodel
Verification trail
Polls verified3 / 6deterministic
Polls flaggednone
Markets ingested0 platformsnone listed
FEC filingssyncedcommittee + IE · 2022-10-28
Endorsements3 totalWikipedia scrape
News coverage< 5 articlesGoogle News
Method · bounds + percentage totals + date-order checks