State officials are pushing back on the Department of Homeland Security’s claims that it found tens of thousands of noncitizens on their voter rolls, asking the department to explain how it arrived at its conclusion. All three states have declined to share private state voter roll data that includes personal identifying information like Social Security numbers. DHS did not immediately respond to a request for comment on the new responses from state officials. Sometimes, noncitizens do end up on states’ voter rolls, but, historically, few have attempted to cast a ballot. The number of noncitizens that New Jersey found on its voter rolls fell short of the 35,000 that DHS claimed.