Sen. Herb Kohl (D-Wisc.) $173.5 million
Herbert H. "Herb" Kohl (born February 7, 1935) is an American businessman and politician. He is the senior United States Senator from Wisconsin and a member of the Democratic Party. He is also a philanthropist and the owner of the Milwaukee Bucks National Basketball Association (NBA) team. He is not seeking reelection in 2012. His net worth dropped nearly by half since 2006, when his estate was valued at $337 million.
