Senate Democratic Leader Harry Reid has told associates he intends to oppose confirmation of John Roberts as chief justice, Senate sources said Tuesday as rank and file Democrats began staking out positions on the man named to succeed the late William H. Rehnquist. Reid scheduled a speech on the Senate floor for mid-afternoon, at which he was expected to make his announcement public. Roberts has strong Republican support and appears headed for easy confirmation. As party leader, Reid had urged fellow Democrats not to announce their positions until the conclusion of last week's confirmation hearings for Roberts. By stating his...