In Grafton District 1 Democrat challenger Linda Massimilla is guaranteed one of the two seats, according to final totals compiled by the Associated Press.
But it's unclear whether the second seat will go to incumbent Republican Lyle Bulis or Republican Ralph Doolan.
Massimilla had 2,263 votes.
Meanwhile Bulis had 1,667 - only two votes more than Doolan. It wasn't clear whether Doolan will seek a recount.
The district includes Littleton and Bethlehem and was redrawn this year.
