Tammy Suzanne Green Baldwin (born February 11, 1962) is an American politician serving as the junior United States Senator from Wisconsin since January 2013. A member of the Democratic Party, she served three terms in the Wisconsin State Assembly, representing the 78th district, and from 1999 to 2013 represented Wisconsin’s 2nd congressional district in the United States House of Representatives.
In the 2012 United States Senate election in Wisconsin, Baldwin was elected to the United States Senate, defeating Republican nominee Tommy Thompson. In the 2018 United States Senate election in Wisconsin, Baldwin was reelected, defeating Republican nominee Leah Vukmir.
Baldwin, who is a lesbian, became the first LGBT woman elected to the House of Representatives and to the Senate in 1999 and 2013, respectively. She also was the first woman to be elected to either chamber from Wisconsin.