A special election on Tuesday to fill an open seat in the U.S. House from Ohio went to an National Rifle Association-endorsed Republican who narrowly bested his opponent in a hard-fought campaign.

In Ohio’s 12th District, former state lawmaker Troy Balderson beat Democratic contender Danny O’Connor by just over 1,700 votes to pick up a 50.3 percent margin with 100 percent of the precincts reporting. Pending the tally of outstanding provisional and absentee ballots, Balderson will fill the seat left open following the resignation of Republican U.S. Rep. Pat Tiberi.

O’Connor was endorsed and supported by national gun control groups to include Giffords, Everytown and Moms Demand Action. “Danny is fighting to put the safety of Ohio communities ahead of the interests of the gun lobby in Washington DC,” said former U.S. Rep. Gabrielle Giffords in her endorsement last month. “He is a champion for gun safety who is bold enough to imagine a world where the type of violence we’ve seen is no longer a daily problem.”

In speaking about his platform, O’Connor said that AR-15s “do not have a place in our society” and that “no one needs a 30-round automatic magazine.”

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