(AP) — A bill that seeks to nullify federal gun restrictions in Nebraska is being used to help state Sen. Charlie Janssen raise money in his campaign for governor.

Janssen’s campaign staff sent a fundraising email to supporters on Thursday, calling attention to legislation that the Republican lawmaker sponsored this year.

Janssen has courted gun owners as he competes in the GOP primary. He spoke recently to the Nebraska Firearms Owners Association.

The email came as the Republican-led Missouri Legislature prepares to override Gov. Jay Nixon’s veto of a bill that would render federal gun restrictions unenforceable in that state. Opponents have said the bill can’t survive a court challenge.

Sen. Ernie Chambers of Omaha criticized the Nebraska measure as “preposterous” in a hearing earlier this year.