Isiah Whitlock, Jr., born September 13 1954 in South Bend, Indiana, USA, is an actor. He plays Senator Clay Davis in The Wire. He is a starring cast member in the fifth season. He initially appeared as a recurring guest star in the first, second, third, & fourth seasons. He has been active since 1987 and has also appeared in the films 25th Hour (2002), 1408 (2007), Enchanted (2007), and Cedar Rapids (2011).
He also is notable for appearing in Spike Lee films She Hate Me and 25th Hour as Agent Amos Flood. In those projects and The Wire, Whitlock established a catchphrase from his characters' distinct pronunciation of the word "shit" ("sheeeeeeit"). Whitlock also made appearances on Chappelle's Show and has made several appearances as various characters on Law & Order.