Timothy Michael Kaine (born February 26, 1958) is an American lawyer and politician serving as the junior United States senator from Virginia since 2013. A member of the Democratic Party, he served as the 38th lieutenant governor of Virginia from 2002 to 2006 and 70th governor of Virginia from 2006 to 2010. Kaine was the Democratic nominee for vice president of the United States in the 2016 election as Hillary Clinton's running mate.

Born in Saint Paul, Minnesota, Kaine grew up in Overland Park, Kansas, graduated from the University of Missouri in Columbia, Missouri, and earned a Juris Doctor degree from Harvard Law School before entering private practice and becoming a lecturer at the University of Richmond School of Law. He was first elected to public office in 1994, when he won a seat on the Richmond City Council. He was elected mayor of Richmond in 1998 and held that position until being elected lieutenant governor of Virginia in 2001. Kaine was elected governor of Virginia in 2005 and held that office from 2006 to 2010. He chaired the Democratic National Committee from 2009 to 2011.