Kenneth Chesebro, an architect of the plan to deploy people claiming to be Trump electors in states won by President Biden, is cooperating with inquiries in Michigan, Arizona and Nevada.
Two Republican lawmakers had argued that they could not be questioned about their motives for supporting the laws, which require proof of citizenship to vote in federal elections.
Under Mark Brnovich, a Republican who left office in January, a 10,000-hour review did not see the light of day. His Democratic successor, Kris Mayes, released investigators’ findings.