Reuters Week In Politics : Justice Stevens Announces Retirement WBUR Melissa Block asks regular political commentators EJ Dionne of The Washington Post and the Brookings Institution and David Brooks of The New York Times. POLITICS BLOG: Brownback thanks Stevens for work on Supreme Court Pittsburg Morning Sun (blog) US Supreme Court Justice Stevens retires Sydney Morning Herald On Replacing the Irreplaceable Justice Stevens Huffington Post (blog) TPI News (blog)