In December 2018, Governor-elect
Tony Evers nominated Brennan as secretary of the
Wisconsin Department of Administration. He was confirmed unanimously by the Wisconsin State Senate in October 2019. As secretary, Brennan oversaw state budget negotiations with the Republican-controlled Legislature and was the lead state official in renegotiating the state's contract with Taiwanese electronics manufacturer Foxconn, reducing the maximum state tax credit exposure from $2.85 billion to $80 million. In late 2021, Brennan announced he was leaving the Evers administration to become president of the Greater Milwaukee Committee, a Milwaukee business and civic organization. In his first campaign finance report covering July through December 2025, Brennan raised $566,212, ranking third among Democratic candidates in the race behind David Crowley and Mandela Barnes. == References ==