Four Democratic senators demanded on Saturday that the Bush administration explain its decision to post documents from Saddam Hussein's covert nuclear program on a now-shuttered federal Web site. The lawmakers told President Bush's director of national intelligence, John Negroponte, that it was "shocking that sensitive documents directly related to the design of a nuclear weapon were made public by the executive branch." Sens. Harry Reid of Nevada, Carl Levin of Michigan, Joe Biden of Delaware and Jay Rockefeller of West Virginia also questioned whether political pressure from congressional Republicans played a role. The letter was released just days before congressional...