2026 elections · South Dakota

South Dakota U.S. Senate

General election Nov. 3, 2026. 2 candidates listed, alphabetically by last name.

Rating: Solid Republican (Cook Political Report: Solid Republican). Ratings are each forecaster’s own judgment.

Ballot list from the state's own certified list of candidates for the November 3, 2026 general election; not yet checked against the state’s own list.

The field

Independent / no party

Brian L. Bengs

Raised
$782,050
From individuals
$775,396
From PACs and other committees
$5,000
From the candidate (gifts + loans)
$0
Cash on hand
$51,406
Debts
$0

FEC, campaign committee totals through June 30, 2026. FEC record

Outside spending

Outside groups spent $0 to support and $549,864 to oppose.

FEC independent expenditures, amendments applied, duplicates removed. Spending dated through Sept. 30, 2026.

PAC and committee money

1 committees reported giving $10,000 in all.

As reported by the giving committees (FEC pas2: direct and in-kind contributions). May differ from the campaign’s own “from other committees” total, which counts what the campaign reports receiving.

Republican Incumbent

Mike Rounds

Raised
$3,176,451
From individuals
$1,328,191
From PACs and other committees
$1,381,800
From the candidate (gifts + loans)
$0
Cash on hand
$2,736,664
Debts
$0

FEC, campaign committee totals through June 30, 2026. FEC record

Outside spending

Outside groups spent $795,596 to support and $265,744 to oppose.

FEC independent expenditures, amendments applied, duplicates removed. Spending dated through Oct. 14, 2026.

PAC and committee money

353 committees reported giving $1,743,555 in all.

As reported by the giving committees (FEC pas2: direct and in-kind contributions). May differ from the campaign’s own “from other committees” total, which counts what the campaign reports receiving.

Tracked networks
  • Tech, AI and cryptoPAC checks $16K · spent to help $641K
  • Companies controlled from outside the U.S.PAC checks $20K
  • Defense contractorsPAC checks $18K
  • Oil, gas and private prisonsPAC checks $5K

Which committees belong to each network is Network groupings matched to FEC committee IDs. Amounts are from FEC files. Bundled (earmarked) money is not counted here.

Money in this race (FEC)
Brian L. BengsIndependent / no party$782,050$51,406$0$549,864
Mike RoundsRepublican$3,176,451$2,736,664$795,596$265,744

Raised and cash on hand are the campaign’s own totals; outside spending is by groups the campaign does not control. They are separate measures and are not added together.

Federal Election Commission bulk data, 2026 cycle: candidate summaries (weball26), committee-to-candidate contributions (pas226) and independent expenditures, downloaded Oct. 16, 2026.

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