IN A 1999 MEMO FROM THEN-SEN. JOE BIDEN (D-DE), BIDEN STRONGLY WARNED AGAINST ALLOWING NEW WITNESSES OR EVIDENCE TO BE BROUGHT INTO THE SENATE IMPEACHMENT TRIAL OF PRESIDENT BILL CLINTON. THE MEMO, OBTAINED BY POLITICO, SHOWED BIDEN CITING NUMEROUS HISTORICAL PRECEDENTS FROM PRIOR IMPEACHMENT CASES AND EVEN ARGUED THAT THE SENATE NEED NOT HOLD A FULL BLOWN TRIAL.