Mark Harris
Idaho State Senator, District 35 since 2016. Re-elected in 2026. Next on the ballot in 2028.
- In office
- 9 yrs
- Since 2016
- Votes missed
- 0.0%
- Chamber median 1.8%
- With party
- 96%
- On votes splitting the parties
- Last margin
- +40.0
- Won 2026
- Next election
- 2028
- Nov 7, 2028
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:52 PM ET
Committees
As of 2026-10.
- Federalism
- Health and Welfare
- Medicaid Review Panel
- Natural Resources Interim
- Resources and Environment
- Rural Health Transformation
- State Affairs
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Voting record
Where Harris sits in the Idaho House of Representatives
Harris is closer to the center than 11% of the chamber's Republicans.
Closest: Heather Scott, Dale Hawkins, Cornel Rasor
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:49 PM ET
With Harris’s party
- Votes with the chamber's Republicans96%
Black tick: the average of Republicans in the Idaho House of Representatives.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Harris’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.
| Date | Bill | Harris | Rep. majority | Dem. majority | Result |
|---|---|---|---|---|---|
| Mar 24, 2025 | S 1148: APPROPRIATIONS – PUBLIC UTILITIES COMMISSION – STATE TAX COMMISSION – INDUSTRIAL… | No | No | Yes | Passed 35–30 |
| Mar 24, 2025 | H 426: APPROPRIATIONS – STATE CONTROLLER – Relates to the appropriation to the Office of the State… | No | No | Yes | Passed 38–32 |
| Mar 24, 2025 | S 1172: APPROPRIATIONS – DEPARTMENT OF COMMERCE – Relates to the appropriation to the Department… | No | No | Yes | Passed 36–33 |
| Mar 21, 2025 | H 418: APPROPRIATIONS – DIVISION OF CAREER TECHNICAL EDUCATION – Relates to the appropriation to… | No | No | Yes | Passed 36–33 |
| Mar 20, 2025 | H 391: APPROPRIATIONS – Relates to replacement items for the Commission for the Blind and Visually… | No | No | Yes | Passed 35–33 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Harris was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.
Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Elections
Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.
| Year | Race | Result | Margin | Seat | +/− |
|---|---|---|---|---|---|
| 2026 | Idaho Legislative District 35 | Won | R+40.0 | R+51.1 | −11.1 |
| 2024 | Idaho State Senate, District 35 | Won | R+55.3 | — | — |
| 2022 | Idaho State Senate, District 35 | Won | — | — | — |
| 2020 | Idaho State Senate, District 32 | Won | — | — | — |
| 2018 | Idaho State Senate, District 32 | Won | — | — | — |
| 2016 | Idaho State Senate, District 32 | Won | R+59.2 | — | — |
| 2016 | Idaho State Senate, District 32 (primary) | Won | — | — | — |
Source: 99chambers results archive; 2026: Idaho Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $64.7K
- Spent
- $56.3K
- Cash
- $65.3K
Source: Idaho Secretary of State filings through Oct 26, 2026Updated Nov 1, 2026, 12:43 AM ET
Campaign committees
Open committees can still raise and spend money.
| Mark Harris for Senate State | Active |
Source: Idaho Secretary of State filings through Oct 26, 2026Updated Nov 1, 2026, 12:43 AM ET
Seats Harris has held
- Idaho State Senate, District 35 · since 2022
- Idaho State Senate, District 32 · since 2016
Source: 99chambers results archive
Who Harris has run against
- Marty Rotz Kilhefner (D) · 2026 general, won
- Chris Riley (D) · 2024 election, won
- Bob Fitzgerald (D) · 2016 election, won
Source: 99chambers results archive; 2026: Idaho Secretary of State (unofficial)
How we know Harris
One person, matched across every source we use.
- Open States ocd-person/84d9ffa4-35f6-4baf-acdd-c3bafee537e7
- Wikidata Q21063629
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:52 PM ET