Bans on noncitizen voting at the state level have become more frequent since 2018. Voters in six states approved ballot measures banning noncitizen voting from 2018 to 2022, and a record eight such measures are on the ballot this year. Republicans in the U.S. House, with support from five Democratic members, recently passed a federal ban on noncitizen voting—the Safeguard American Voter Eligibility (SAVE) Act—221-198.
The source of support is different at the state level.
Looking at all 11 noncitizen voting ban measures that legislatures put on state ballots, 100% of Republican legislators voted to place them on the ballot, save for those who were either absent or did not vote. An average of 45.6% of Democratic legislators voted in favor of these measures.