LINCOLN, Neb. (AP) — Nebraska lawmakers are trying to strike a compromise on a bill that threatens to overturn gun restrictions in Omaha and Lincoln by imposing uniform regulations statewide.

Senators debated the proposal Tuesday but adjourned for the morning without reaching a vote. City officials from Omaha and Lincoln oppose the bill by Sen. Laura Ebke of Crete.

Omaha’s police union says it would undermine the city’s handgun registration ordinance, which lets police deny guns to the mentally ill and known gang associates. Union President John Wells says the bill comes across “not so much as pro-gun, but pro-gang.”

Supporters say the measure would protect gun owners who inadvertently violate the ordinance by traveling through Omaha with a handgun.