The chairman of the Senate committee investigating the Whitewater affair today ruled out calling Hillary Rodham Clinton as a witness unless strong evidence emerged of her involvement in the mishandling of papers from the office of a White House aide who committed suicide two years ago.(snip) The committee today began what will be weeks of intensive questioning of White House aides about whether Mrs. Clinton, in advance of investigators, had told officials to remove papers from the office of Vincent W. Foster Jr., her close friend and former law partner who was the deputy White House counsel at the time...