CalledUnofficial results
Idaho Legislative District 25
Idaho State Senate · Idaho
Casey Swensen held the seat for Republicans, winning by 28.9 points over W. Lane Startin.
Casey SwensenRepublican · winner
64.5%9,207
W. Lane StartinDemocrat
35.5%5,075
14,282 votes
Source: Idaho Secretary of State unofficial resultsUpdated Nov 7, 2026, 1:21 PM ET
Where the race moved
Against the 2024 presidential vote
The seat's recent races
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Money in this race
Each line compares the two campaigns on one scale.
W. Lane StartinCasey Swensen
$3.5K
Raised by the campaign
$56.8K
$4.3K
Spent by the campaign
$52.7K
$2.5K
Cash on hand
$9.1K
Campaign money: Idaho Secretary of State, through Sep 26, 2026; Idaho Secretary of State, through Oct 23, 2026.
Source: Idaho Secretary of State campaign filingsUpdated Sep 26, 2026
Pre-election forecast (final, Nov 3)
Our model's last run before Election Day, Nov 3, 2026. It no longer updates.
- W. Lane Startin
- <1%
- Casey Swensen
- >99%
- Projected margin
- R+30.3