WASHINGTON - Sen. Hillary Rodham Clinton excoriated Defense Secretary Donald Rumsfeld at a Senate hearing Thursday, saying he is presiding over a "failed policy" in Iraq and Afghanistan. "Under your leadership there have been numerous errors in judgment that have led us to where we are," the New York Democrat said at a Senate Armed Services Committee hearing. "We have a full-fledged insurgency and full-blown sectarian conflict in Iraq." The showdown between Clinton, a potential presidential candidate in 2008, and Rumsfeld, the public face of the Bush administration's war effort, included the strongest criticism of the Iraq war she has...