President Bush said Monday his staff is cooperating with an independent commission investigating the Sept. 11 attacks, but he stopped short of saying whether the White House would hand over top-level papers that may be subpoenaed. “Those are very sensitive documents,” Bush said, adding that White House counsel Alberto Gonzales was working with Thomas Kean, chairman of the commission, on this issue. Kean said in an interview that he will resume negotiations with the White House this week and hopes to reach a resolution “one way or the other” on documents the panel is seeking. The commission has the power to issue subpoenas, and Kean said he does not rule out sending one to the White House. Full Story