Wisconsin voters approved an amendment enshrining a photo ID requirement for voting in the state’s constitution. 

The Associated Press called the race at 8:37 p.m. The vote was 61% to 39% with 40% of the votes in.

The amendment passed the GOP-run Assembly and Senate along party lines earlier this year, with all Republicans supporting and all Democrats opposed. 

Wisconsin already requires a photo ID for voting in state law, but Republicans who introduced the amendment expressed concerns that the state Supreme Court could overturn the law in the future. 

Dems criticized the amendment for its potential impact on marginalized groups and said it would make it more difficult for these groups to vote. 

The amendment will require voters to show a valid voter ID from the state, the federal government, a federally recognized Native American tribe, or a state college or university. The Legislature will be able to create exceptions to the requirement.