Susan McDougal asked a federal judge in Little Rock to delay her Whitewater trial in Arkansas while she stands trial on embezzlement charges in Los Angeles. President Clinton's former business partner is scheduled for trial Sept. 28. She is accused of criminal contempt and obstruction of justice for refusing to testify before a grand jury that investigated the Arkansas business deals of Clinton and Hillary Rodham Clinton. Her attorney, Mark Geragos, said in court papers that the California trial could last until Oct. 5. He asked Judge Susan Webber Wright to reschedule McDougal's federal trial for Dec. 8.