99chambers

Horizon · our Election Day forecast: polls, plus fundamentals like incumbency, fundraising and past results.

Pulse · polls only: where the races stand today, with no fundamentals and wider uncertainty.

What's the difference?

New Hampshire · New Hampshire House of Representatives: State House District Merrimack 12 · Updated Oct 16, 2026

Mariana R. Beer

Democratic2 seats

2026 race · New Hampshire House of Representatives: State House District Merrimack 12

46% chance of winning · race rated Toss-up

46%54%

58% chance of winning · race rated Toss-up

58%42%
● Mariana R. Beer● Brian SeaworthINCAlso: Kenneth Nivison (D), Peter L. Mehegan (R)
Full race forecast

Background

Record
No elected office on file.

Links: Candidate list (source)

Opponents in 2026