Tammy Suzanne Green Baldwin (born February 11, 1962) is an American lawyer and politician who has served as the junior United States senator from Wisconsin since 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 2012, Baldwin was elected to the United States Senate, defeating Republican nominee Tommy Thompson. In 2018, Baldwin was reelected, defeating Republican nominee Leah Vukmir.