Democrats also questioned Ms. Lewis about her legal representation by the Landmark Legal Foundation. Landmark, a conservative public interest law firm, called in March for an independent counsel to investigate Mr. Clinton's legal fund, and has filed a complaint against other Democrats.
In separate hearings before the Senate Whitewater committee yesterday, New York lawyer Susan Thomases, a close friend of Hillary Rodham Clinton, denied trying to restrict a police search of the office of deputy White House counsel Vincent W. Foster Jr. after his 1993 suicide.
Today, the Senate committee is expected to hear testimony from Bernard W. Nussbaum, the former White House counsel who has emerged as the pivotal player in events that followed Mr. Foster's death. Republicans assert that he kept law enforcement officials at a distance when they attempted to search Mr. Foster's office because he was hiding something.
In a New York Times op-ed piece yesterday, previewing today's testimony, Mr. Nussbaum wrote that he was "ethically and legally obliged to protect the confidentiality of all the files in Mr. Foster's office" and that, two years later, "I am still comfortable with the ethical and legal judgments I made."