Katherine Prudhomme-O'Brien
New Hampshire State Representative, District 713 since 2014. Did not run for re-election in 2026; leaves office in January 2027.
- In office
- 12 yrs
- Since 2014
- Bills became law
- 0
- 0 sponsored, 2025–2026 session
- Votes missed
- 7.4%
- Chamber median 5.8%
- With party
- 98%
- On votes splitting the parties
- Last margin
- +-0.7
- Won 2024
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Election Law
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
No bills in this list for the 2025–2026 session.
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Prudhomme-O'Brien sits in the New Hampshire House of Representatives
Prudhomme-O'Brien is closer to the center than 45% of the chamber's Republicans.
Closest: Matthew Pitaro, Linda McGrath, J.D. Bernardy
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:56 PM ET
With Prudhomme-O'Brien’s party
- Votes with the chamber's Republicans98%
- Cosponsorships of the other party's bills13%
Black tick: the average of Republicans in the New Hampshire House of Representatives.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Prudhomme-O'Brien’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.
| Date | Bill | Prudhomme-O'Brien | Rep. majority | Dem. majority | Result |
|---|---|---|---|---|---|
| Aug 19, 2026 | HB 221: enabling electric utilities to own, operate, and offer advanced nuclear resources, and… | Yes | Yes | No | Failed 152–167 |
| Aug 19, 2026 | HB 1337: repealing the New Hampshire council on autism spectrum disorders. | No | Yes | No | Failed 148–172 |
| Aug 19, 2026 | HB 1442: permitting classification of individuals based on biological sex under certain limited… | Yes | Yes | No | Passed 165–149 |
| Aug 19, 2026 | HB 1358: establishing a commission to study transitioning all public schools to public charter… | Yes | Yes | No | Failed 150–166 |
| Aug 19, 2026 | HB 1726: relative to the sale of surplus state-owned land and establishing a commission to study… | No | Yes | No | Failed 101–206 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Prudhomme-O'Brien 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 |
|---|---|---|---|
| 2024 | New Hampshire House of Representatives, District 713 | Won | D+0.7 |
| 2022 | New Hampshire House of Representatives, District 713 | Won | D+0.4 |
| 2020 | New Hampshire House of Representatives, District 706 | Won | D+0.6 |
| 2018 | New Hampshire House of Representatives, District 706 | Won | D+0.8 |
| 2014 | New Hampshire House of Representatives, District 706 | Won | D+0.8 |
Source: 99chambers results archive
Seats Prudhomme-O'Brien has held
- New Hampshire House of Representatives, District 713 · since 2022
- New Hampshire House of Representatives, District 706 · since 2018
- New Hampshire House of Representatives, District 706 · since 2014
Source: 99chambers results archive
Who Prudhomme-O'Brien has run against
- David Love (R) · 2024 general, won
- Jodi Nelson (R) · 2022 general, won
- David C. Love (R) · 2020 general, won
- Phyllis Katsakiores (R) · 2018 general, won
- Katsakiores (R) · 2014 general, won
Source: 99chambers results archive
How we know Prudhomme-O'Brien
One person, matched across every source we use.
- Open States ocd-person/a0a8c9d8-1f27-4d28-a249-8a5856ea5c05
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET