The Trump administration has filed an emergency appeal with the Supreme Court seeking approval to use a federal immigration database to identify potentially ineligible voters on state registration lists. The move follows an executive order issued by President Trump last year directing the Department of Homeland Security (DHS) to share information with state election officials regarding voter eligibility and to cross-check state voter rolls against federal data.

Over the past 18 months, the administration developed a verification system that integrates immigration records, including citizenship status, with Social Security information and other federal databases. This effort aims to detect noncitizens or others who may be improperly registered to vote.

However, voting rights groups have challenged the system, arguing that it infringes on privacy rights and generates inaccurate results. In June, a federal judge ruled against the system, deeming it unlawful and ordering it to be disabled. Last week, a federal appeals court upheld that decision.

Solicitor General John Sauer, in the emergency request to the Supreme Court, argued that the lower court rulings have made it more difficult to identify ineligible voters, damaging the integrity of federal elections and eroding public confidence in electoral outcomes.

President Trump has repeatedly asserted that large numbers of ineligible individuals, including noncitizens, are registered to vote nationwide, raising concerns he might dispute the validity of upcoming midterm election results if Republicans perform poorly. These claims have been met with skepticism from many state election officials, including Republicans, who maintain that voter rolls are secure and that instances of noncitizen voting are rare and have not influenced election results.

For example, New Jersey officials reported this summer that they had found up to 6,600 noncitizens mistakenly registered to vote, with as many as 400 possibly having cast ballots. Meanwhile, several Republican-led states have expressed interest in using the new federal database to review and update their voter rolls and are pursuing separate litigation to gain access to the data.

The Supreme Court’s decision on whether to allow the deployment of the immigration-based verification system could have significant implications for election administration and ongoing debates over voter eligibility verification in the United States.