He at first refused to certify Biden's win there and was also a vaccine denier. From the Times:
"William Hartmann, one of two Republican election officials from Michigan who initially refused to certify the results of the 2020 presidential election in Wayne County, where Joe Biden had trounced Donald J. Trump, died on Nov. 30 at a hospital in Wyandotte, Mich., near Detroit. He was 63.
About two weeks before Mr. Hartmann’s death, which was confirmed by the Michigan Republican Party, his sister, Elizabeth Hartmann, wrote on Facebook that he was “in ICU with Covid pneumonia and currently on a ventilator.” Mr. Hartmann had been outspoken in his opposition to Covid vaccines.
He drew national attention after he and another Republican member of the Wayne County Board of Canvassers, Monica Palmer, refused to certify the election results. Mr. Biden had won the county, which includes the city of Detroit, with 68 percent of the vote, compared with 31 percent for Mr. Trump.
The two election officials pointed to minor recording discrepancies involving a few hundred votes, though the discrepancies had no effect on the outcome: Mr. Biden won the county by more than 330,000 votes. But their refusal to certify the results left the Wayne County board, made up of two Republicans and two Democrats, deadlocked. It also threatened to hold up the certification of Michigan’s entire vote."