I think you mean to say, 'Trent Lott did not do his duty.' Bob Dole retired after the 1996 election.
It was Trent Lott that failed to conduct a Senate trial of Clinton.
Guess I confused one Republican 'spineless wonder' for the other.
Bob Dole was certainly retired by Jan 1999 as he was being the 'statesman' spokesman for Viagra.