Rehnquist will administer an oath to the senators.
Further procedures are uncertain.
One GOP source, speaking on condition of anonymity, said it would probably be February at the earliest before votes are taken on the president's fate. Democrats vowed opposition to any plan to call witnesses, and insisted they had not been presented with a written proposal for Clinton's trial. By a vote of the GOP-controlled House last year, the nation's 42nd president stands accused of two articles of impeachment alleging perjury and obstruction of justice in connection with attempts to conceal his sexual relationship with Ms. Lewinsky. At one point during the day, Senate Minority Leader Tom Daschle, D-S.D., said there was ''universal, unanimous opposition to witnesses'' among Democrats. We didn't involve ourselves in their proceedings and it is very disturbing that they now seem to be intent on involving themselves in ours,'' he said.