Tom Barrett served as the 44th mayor of Milwaukee from 2004 until 2021. The mayoral position is non-partisan. A member of the Democratic Party, he was previously elected to the Wisconsin State Assembly (1984–1989), Wisconsin Senate (1989–1993) and U.S. House of Representatives (1993–2003). Barrett lost bids for governor in 2002, 2010 and in the 2012 recall race against Gov. Scott Walker. He was sworn in as U.S. ambassador to Luxembourg on Dec. 23, 2021.