Despite his support for background checks, for many gun owners in Pennsylvania, Republican Sen. Patrick J. Toomey might be “the lesser of two evils” in his race against Democrat Katie McGinty.

Toomey previously had the support of the National Rifle Association in his Senate run in 2010. But after the 2012 shooting at Sandy Hook Elementary School in Newtown, Connecticut, Toomey teamed up with Democratic Sen. Joe Manchin III of West Virginia, another senator who previously had the NRA’s support, to push legislation on background checks.

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Gun rights groups in Pennsylvania are now forced to choose between Toomey, whom they see as a threat to the Second Amendment, and Democrat Katie McGinty, whom they see as a bigger threat.

David Sager, the president of Pennsylvanians for Self Protection, told The Associated Press that his group might not endorse Toomey, but will try to make it clear that he’s the “lesser of two evils” in the Senate race.