We’ll never know what role noncitizen voting has played in past elections, but the problem is real. While states like New York ignore this problem, other states have passed rules to deal with it.

In addition to voter ID laws, Kansas and Arizona have put in place new proof-of-citizenship requirements for registration to prevent illegal voting. It is a common-sense and needed reform. In recent weeks North Carolina found more than 100 illegal aliens, still in the country thanks to the Obama administration’s Deferred Action for Childhood Arrivals program, registered to vote. Yet opponents including the League of Women Voters and Common Cause are challenging citizenship requirements in the courts.

Some states have also tried to eliminate same-day registration, which is a recipe for fraud since it prevents election officials from verifying the eligibility of voters and the accuracy of voter-registration information. States also are reducing early voting days, a relatively new phenomenon that has its share of election-administration problems.