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Race2026 cycle · General electionElection day 3 Nov 2026Updated

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DonorAlpha, “Kansas Senate general 2026”, https://donoralpha.com/races/kansas-senate-general-2026, updated .

Kansas Senate general 2026

Prediction market7 Oct 2026

Roger Marshall 63.5% · prediction market price

No. 12 of 27 Senate races in the 2026 general election

The short version

In the 2026 Kansas Senate general election, 9 outside groups spent $7.9M: $43,786 supporting Roger Marshall (R), $4.8M opposing Roger Marshall, $512K supporting Adam Hamilton (D) and $2.5M opposing Adam Hamilton.

$7.9M

outside money

supporting Roger Marshall (R)
$43,786
opposing Roger Marshall (R)
$4.8M
supporting Adam Hamilton (D)
$512K
opposing Adam Hamilton (D)
$2.5M

Result not in yet

Election day is 3 Nov 2026.

  • Roger Marshall

    Republican

    Waiting for the count

  • Adam Hamilton

    Democrat

    Waiting for the count

Outside money supporting and opposing each candidate

Both sides on one scale
← OpposingSupporting →

  • Roger Marshall Republican

    $4.8M
    $43,786

    $43,786 supporting Roger Marshall · $4.8M opposing Roger Marshall

  • Adam Hamilton Democrat

    $2.5M
    $512K

    $512K supporting Adam Hamilton · $2.5M opposing Adam Hamilton

The long version

The candidates

What each candidate’s own campaign raised, beside what outside groups spent supporting and opposing them.

  • Roger Marshall

    Republican

    Own campaign raised
    $4.0M
    Outside money supporting
    $43,786
    Outside money opposing
    $4.8M
    Kansans for Marshall

  • Adam Hamilton

    Democrat

    Own campaign raised
    $4.2M
    Outside money supporting
    $512K
    Outside money opposing
    $2.5M
    Hamilton for Kansas
  • Campaign money to 15 Jul 2026

Week by week

Outside money each week, supporting and opposing the candidates, all candidates combined.

Week of 28 Sep 2026

Supporting $287KOpposing $2.6M

Supporting candidatesOpposing candidates

The groups on each side

The biggest outside groups in this race, by what they spent supporting or opposing each candidate.

Spent supporting a candidate

  1. United Futures PACsupporting Adam Hamilton$509K
  2. Senate Conservatives Fundsupporting Roger Marshall$32,568
  3. Senate Conservatives Actionsupporting Roger Marshall$11,218
  4. Lower Costs Nowsupporting Adam Hamilton$3,035

Spent opposing a candidate

  1. People Over Politics Action Fundopposing Roger Marshall$3.4M
  2. Main Street Fundopposing Adam Hamilton$2.0M
  3. Lower Costs Nowopposing Roger Marshall$696K
  4. The 1861 Initiativeopposing Roger Marshall$600K
  5. Senate Leadership Fundopposing Adam Hamilton$546K
  6. United Futures PACopposing Roger Marshall$32,703
  7. United Futuresopposing Roger Marshall$25,000

Who’s connected to whom

The groups that spent supporting or opposing the candidates.

Their biggest giversGroups that spentCandidatesPeople Over Politics Action Fund spent $3.4M opposing Roger Marshall · $3.4MMain Street Fund spent $2.0M opposing Adam Hamilton · $2.0MLower Costs Now spent $696K opposing Roger Marshall · $696KThe 1861 Initiative spent $600K opposing Roger Marshall · $600KSenate Leadership Fund spent $546K opposing Adam Hamilton · $546KUnited Futures PAC spent $509K supporting Adam Hamilton · $509KUnited Futures PAC spent $32,703 opposing Roger Marshall · $32,703Senate Conservatives Fund spent $32,568 supporting Roger Marshall · $32,568United Futures spent $25,000 opposing Roger Marshall · $25,000Lower Costs Now spent $3,035 supporting Adam Hamilton · $3,035Western Futures Fund gave $2.0M to The 1861 Initiative · $2.0MGlobal Impact Social Welfare Fund (DC) gave $300K to The 1861 Initiative · $300KOne Nation gave $70.7M to Senate Leadership Fund · $70.7MChevron Corporation gave $3.9M to Senate Leadership Fund · $3.9MBlessey Marine Service, Inc. Political Action Committee gave $5,000 to Senate Conservatives Fund · $5,000Western Futures FundWestern Futures FundCompany or group · $2.0MGlobal Impact Social WelfareFund (DC)Global Impact Social Welfare Fund (DC)Company or group · $300KOne NationOne NationCompany or group · $70.7MChevron CorporationChevron CorporationCompany or group · $3.9MBlessey Marine Service, Inc.Political Action CommitteeBlessey Marine Service, Inc. Political Action CommitteeCompany or group · $5,000People Over Politics ActionFundPeople Over Politics Action FundGroup · $3.4MMain Street FundMain Street FundGroup · $2.0MLower Costs NowLower Costs NowGroup · $699KThe 1861 InitiativeThe 1861 InitiativeGroup · $600KSenate Leadership FundSenate Leadership FundGroup · $546KUnited Futures PACUnited Futures PACGroup · $542KSenate Conservatives FundSenate Conservatives FundGroup · $32,568United FuturesUnited FuturesGroup · $25,000Roger MarshallRoger MarshallCandidate · $4.8MAdam HamiltonAdam HamiltonCandidate · $3.1M
  • People Over Politics Action Fund spent opposing Roger Marshall · $3.4M
  • Main Street Fund spent opposing Adam Hamilton · $2.0M
  • Lower Costs Now spent opposing Roger Marshall · $696K
  • The 1861 Initiative spent opposing Roger Marshall · $600K
  • Senate Leadership Fund spent opposing Adam Hamilton · $546K
  • United Futures PAC spent supporting Adam Hamilton · $509K
  • United Futures PAC spent opposing Roger Marshall · $32,703
  • Senate Conservatives Fund spent supporting Roger Marshall · $32,568
  • United Futures spent opposing Roger Marshall · $25,000
  • Lower Costs Now spent supporting Adam Hamilton · $3,035
  • Western Futures Fund gave to The 1861 Initiative · $2.0M
  • Global Impact Social Welfare Fund (DC) gave to The 1861 Initiative · $300K
  • One Nation gave to Senate Leadership Fund · $70.7M
  • Chevron Corporation gave to Senate Leadership Fund · $3.9M
  • Blessey Marine Service, Inc. Political Action Committee gave to Senate Conservatives Fund · $5,000
GaveSpent supportingSpent opposingSwipe to see the whole map.
  • People Over Politics Action Fund spent $3.4M opposing Roger Marshall$3.4M

Polls

Every poll of this race on one timeline.

The average of 2 polls to 24 Sep 2026 has Adam Hamilton at 47.5% and Roger Marshall at 45.5%.

2polls in the average

polls of this race
3
pollsters
3

Adam HamiltonRoger Marshall

Wedgewood Polls22 Sep to 24 Sep 2026 · 500 likely voters
DemocraticAdam Hamilton50.0%
RepublicanRoger Marshall48.0%

Also asked · David Graham 2.0%

Point at a dot, or tab in and use the arrow keys

Every poll, newest first

  1. 24 Sep ’26Wedgewood Polls 22 Sep to 24 Sep 2026 · 500 likely votersAdam Hamilton 50.0%Roger Marshall 48.0%David Graham 2.0%
  2. 16 Sep ’26Emerson College 15 Sep to 16 Sep 2026 · 750 likely votersAdam Hamilton 45.0%Roger Marshall 43.0%David Graham 4.0%
  3. 28 Jan ’26Tavern Research 26 Jan to 28 Jan 2026 · 1,013 likely votersAdam Hamilton 46.0%Roger Marshall 54.0%
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