The archivists' decision, based on guidance provided by Bill Clinton that restricts the disclosure of advice he received from aides, prevents public scrutiny of documents that would shed light on how he decided which pardons to approve from among hundreds of requests. . . .The decision to withhold the records could provide fodder for critics who say that the former president and his wife, Sen. Hillary Rodham Clinton, now seeking the Democratic presidential nomination, have been unwilling to fully release documents to public scrutiny. . . .