Wisconsin's strict photo ID requirements for voters will now be enshrined into the state constitution after voters approved the proposal on Tuesday's ballot.

Wisconsin is one of nine states where people must present photo ID to vote, and its requirement is the nation’s strictest, according to the National Conference of State Legislatures. Thirty-six states have laws requiring or requesting that voters show some sort of identification, according to the NCSL.

Anyone age 18 or older must have at least a REAL ID-compliant state-issued driver’s license or another acceptable form of ID to board domestic flights beginning May 7.

The Real ID compliance rate for eligible Massachusetts residents is below 60% with just weeks to go before the deadline.

This is a BIG WIN FOR REPUBLICANS, MAYBE THE BIGGEST WIN OF THE NIGHT,” President Trump said of the success of the ballot measure.

Starting May 7, driver’s licenses and identification cards that are not Real ID-compliant will no longer be accepted for domestic air travel.

Wisconsin voters head to the polls Tuesday to weigh in on a ballot measure that would constitutionally enshrine a requirement for photo ID in order to vote. State law already requires Wisconsin

Wisconsin voters cast their ballots on Tuesday, April 1 in favor of enshrining a voter ID requirement into the state constitution.

Wisconsin residents vote Tuesday in elections for the vacant state Supreme Court seat, state superintendent and a voter ID referendum — as well as local races. Live results will be posted here after polls close at 8 p.