The special counsel overseeing the U.S. Justice Department’s investigations related to Donald Trump has subpoenaed local election officials in Arizona, Michigan and Wisconsin for records of their communications with the former president, his aides, campaign staff and supporters, the Washington Post reported on Tuesday.

Officials in Milwaukee and Dane counties in Wisconsin received subpoenas dated Nov. 22, according to copies provided to Reuters. The Washington Post reported that officials in Arizona’s Maricopa County and Michigan’s Wayne County also received subpoenas.

Smith was appointed special counsel last month to take charge of the department’s investigations regarding Trump, including his alleged handling of sensitive documents and efforts to overturn the 2020 election.