Albany, N.Y. - An incumbent Republican congressman in central New York is facing a tea party-backed primary challenger who's hoping for an upset by questioning his GOP credentials.

The contest Tuesday between two-term Congressman Richard Hanna of Barneveld and state Assemblywoman Claudia Tenney of New Hartford could effectively settle this year's race in the 22nd District. There's no Democratic candidate.

Hanna is rated as a moderate in Congress. He was endorsed by the National Rifle Association and most county committees in the district.

Tenney, who opposes the gun control law championed by Gov. Andrew Cuomo, was endorsed by the state Conservative Party.

Hanna also has the Independence Party line in the November election.

The district runs from Lake Ontario around Oswego through the Mohawk Valley to the Pennsylvania border around Binghamton.