Nebraska voters on Tuesday approved a new photo identification requirement for upcoming elections. 

Two-thirds of U.S. states already required some form of identification to vote, although not all mandated a photo ID.

Nebraska was among the states without an ID requirement, but not without years of efforts from Republicans in the legislature. Lawmakers are expected to iron out the details later. 

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This measure made the ballot due to Marlene Ricketts, mother of Republican Gov. Pete Ricketts and the initiative's main financial backer.

Citizens for Voter ID at the Nebraska Capitol building

Boxes of signatures are displayed after a new conference hosted by Citizens for Voter ID at the Nebraska Capitol building on July 7, 2022, in Lincoln, Nebraska.  (Noah Riffe/Lincoln Journal Star via AP)

Ricketts claimed the 2020 election revealed that "people had concern about the integrity of our voting systems." However, there was no evidence of widespread fraud in Nebraska, which supporters acknowledged. They contended the law was needed to prevent future abuse. 

Nebraska Gov. Pete Ricketts

Pete Ricketts, governor of Nebraska, speaks during the SelectUSA Investment Summit in National Harbor, Maryland, on Thursday, June 21, 2018.  (Photographer: Andrew Harrer/Bloomberg via Getty Images)

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Democrats argue that such requirements are meant to tamp down voter turnout by minorities and others who are more likely to not have appropriate ID and tend to vote for the party.

In Arizona, the votes were still being counted for a measure that would eliminate an alternative of providing two documents that included a voter's name and address in place of an existing photo ID. 

Nebraska voters

Homer Wesson, right, votes at the Malcolm X Memorial Foundation at 3448 Evans Street on Tuesday, Nov. 8, 2022, in Omaha, Nebraska.  (Chris Machian/Omaha World-Herald via AP)

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Those voting by mail — the majority of the state — would have to list their date of birth and either their driver’s license number, a state identification number or the last four digits of their Social Security number.

Voting-related measures were among more than 130 state proposals appearing on ballots.

The Associated Press contributed to this report.