Voters in eight states, most of them heavily Republican, are deciding on ballot measures this year that aim to require US citizenship to vote – even though it is already illegal for noncitizens to cast ballots in federal elections.

Counties and municipalities in those states could not allow noncitizens to vote in their elections. It is currently legal for noncitizens to vote in some local elections in at least 17 cities across the United States, including San Francisco and Oakland ...

Eight states will take to the polls on Tuesday to decide on ballot measures that would require proof of U.S. citizenship to vote.

Are voter ID laws in US presidential elections too lax to prevent noncitizen votes? DW investigates how US voter ID rules really work.