TOPEKA, Kan. — A move by Kansas Secretary of State Kris Kobach to allow the state to enforce its proof-of-citizenship requirement for some new voters has prompted another attempt to block him.

Attorneys for a prospective voter asked a federal judge Wednesday to reject Kobach’s formal answer to a lawsuit against the requirement.

An attorney for Kobach filed his answer to the suit late Tuesday, weeks after the deadline.

Kobach’s filing came hours after a court clerk entered a default judgment against him for failing to respond. If the action stands, the state can’t enforce a 2013 law requiring new voters to document their U.S. citizenship when registering.

Previous court rulings have temporarily narrowed the requirement so it doesn’t apply to people registering with a federal form or at state motor vehicle offices.