Opponents of a state constitutional amendment that passed in 2014 to allow tougher abortion restrictions are appealing to the U.S. Supreme Court after a circuit appellate court denied a recount.

The appeal in the Amendment 1 case was filed earlier this month.

A 6th U.S. Circuit Court of Appeals opinion in January said the state's vote tabulating method was reasonable and true to the meaning of the state constitution and didn't infringe on plaintiffs' voting rights.

The order overturned an April 2016 district court ruling that sided with eight voters that sued the state by ordering the recount. The judge called Tennessee's vote-counting unconstitutional and fundamentally unfair. The recount was put on hold pending the appeal.

Tennessee officials have said they followed their longstanding practice of counting amendment votes.