Gun control advocates believe the aftermath of the deadly shooting at a Pittsburgh synagogue could help swing the midterm elections against endangered suburban Republicans who are seen as too pro-gun.

Andrew Patrick, who works as the Coalition to Stop Gun Violence’s media director, cited Comstock’s race against Democratic challenger state Sen. Jennifer Wexton as one of the races where the gun issue will play a role. Comstock’s district is near the National Rifle Association’s headquarters. In September, former congresswoman Gabrielle Giffords’ group began airing an ad targeting Comstock.