The Ballot Brief
Merrimack County, New Hampshire

New Hampshire House, Merrimack District 12

See where Seaworth, Mehegan, Beer and Nivison stand on schools and taxes. Names follow official Merrimack County election filings.

About this race

Brian Seaworth (Republican), Peter L. Mehegan (Republican), Mariana R. Beer (Democratic), Kenneth Nivison (Democratic) are on the November 3 ballot for New Hampshire House, Merrimack District 12; Brian Seaworth, Peter L. Mehegan are sitting members, per the General Court's official member list (gc.nh.gov). This is a two-seat district: voters choose up to two candidates, and the top two finishers are elected. Nominees are each party's top finishers in the September 8, 2026 state primary, per the Secretary of State's town-by-town results; the Secretary of State's September 17, 2026 general election candidate list confirms the printed field, including nomination-paper candidates.

What this office does

State legislator. State legislators write and vote on state laws and the state budget, which fund schools, roads, prisons, universities and health programs, and set the rules for local governments and elections. Each member represents one district and serves on committees that shape bills before a floor vote. Terms are two years in most state houses and four in most state senates.

This race. Voters choose 2; the top 2 finishers win seats. Elected by district: only voters who live in the district see this race on their ballot. Sitting officeholders on the ballot: Brian Seaworth, Peter L. Mehegan.

This list comes from official election records but may be incomplete. It can miss, for example, late or petition candidates and some city, school and district races. Your official sample ballot is the final word.

We use AI to research and write election information. Errors are possible. Verify important details with official sources.

New Hampshire › Merrimack County › New Hampshire House, Merrimack District 12

Brian Seaworth

RepublicanIncumbent

Top priorities

From other published sources

  • Has supported funding education through local property taxes and parental rights in schools in his legislative record, per Citizens Count voting record
  • Has opposed stricter gun laws in his legislative record, per Citizens Count voting record
Biography

Brian Seaworth, the sitting representative for New Hampshire House Merrimack District 12, is vice-chair of the Pembroke Planning Board and has served in the NH House since 2014, per his Citizens Count candidate profile.

Campaign site (opens in a new tab)

Peter L. Mehegan

RepublicanIncumbent

Top priorities

From other published sources

  • Says he will not vote for a broad-based tax in any form, per Citizens Count 2026 Issue Survey
  • Opposes marijuana legalization, citing health concerns about THC, per Citizens Count 2026 Issue Survey
Biography

Peter L. Mehegan, the sitting representative for New Hampshire House Merrimack District 12, has taught French and directed theater at Pembroke Schools for 40 years, per his Citizens Count candidate profile.

Campaign site (opens in a new tab)

Mariana R. Beer

Democratic

Top priorities

From other published sources

  • Supports guaranteeing abortion access before 24 weeks and opposes first- and second-trimester bans, per Citizens Count 2026 Issue Survey
  • Supports reinstating the interest and dividends tax and opposes a broad-based income tax, per Citizens Count 2026 Issue Survey
  • Supports funding the Office of the Child Advocate and public school open enrollment with limits, per Citizens Count 2026 Issue Survey
Biography

Mariana R. Beer, a Democratic candidate for New Hampshire House Merrimack District 12, is director of operations at Dunbarton Tobacco and Trust and serves on the Pembroke Budget Committee, per her Citizens Count candidate profile.

Campaign site (opens in a new tab)

Kenneth Nivison

Democratic

Top priorities

From other published sources

  • Opposes Education Freedom Accounts, saying they shift a greater burden onto local public schools, per Citizens Count 2026 Issue Survey
  • Supports reinstating the interest and dividends tax and opposes lowering business taxes, per Citizens Count 2026 Issue Survey
  • Supports red flag laws, closing gun-purchase loopholes and banning assault weapons while protecting sporting and self-defense rights, per Citizens Count 2026 Issue Survey
Biography

Kenneth Nivison, a Democratic candidate for New Hampshire House Merrimack District 12, is a history professor and serves on the Pembroke School Board, per his Citizens Count candidate profile.

Campaign site (opens in a new tab)
Next on your ballotNew Hampshire House, Merrimack District 13

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Questions about this race

Who is running for New Hampshire House, Merrimack District 12 in 2026?

4 candidates are tracked for New Hampshire House, Merrimack District 12 on the November 3, 2026 ballot: Brian Seaworth, Peter L. Mehegan, Mariana R. Beer and Kenneth Nivison. Candidate information follows official Merrimack County election filings; verify with the official election office linked below. See where they stand on schools and taxes.

When is the New Hampshire House, Merrimack District 12 election in New Hampshire?

Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for New Hampshire are on the New Hampshire election hub at theballotbrief.com.

How do I see my exact Merrimack County ballot?

Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.

Verify this race

Candidate roster from official Merrimack County and state election office filings, last verified October 24, 2026. Bios and priorities carry their attribution inline.

Cross-check with the official New Hampshire election office, or see the full Merrimack County sample ballot and your exact ballot by address.

The rest of your Merrimack County ballot

47 tracked races in Merrimack County, New Hampshire. Landed here from another county's search? Look up your own ballot below.

Also on your ballot
New Hampshire House, Merrimack District 14New Hampshire House, Merrimack District 15New Hampshire House, Merrimack District 16See all 47 Merrimack County races
Candidate profiles
Brian Seaworth, full profilePeter L. Mehegan, full profileMariana R. Beer, full profileKenneth Nivison, full profileOfficial New Hampshire election office