A whistleblower claimed a Department of Homeland Security effort to investigate voter fraud violated state laws, a charge the agency denies.

On Monday, Senate Democrats announced their reveal of a whistleblower complaint regarding a DHS effort to investigate voter fraud. According to the whistleblower, DHS had directed U.S. Citizenship and Immigration Services officers to violate state laws as part of its “Unlawful Voter Initiative,” which seeks to gather evidence about voter fraud.