I may have incomplete knowledge on this, but I am aware of only one case that comes close to a nominee being Filibustered on the Senate Floor and that was Abe Fortas who was on the Supremem Court and Pres Lyndon Johnson nominated him for the Chief Justice position. However he had accepted outside income, which he was not suppose to do, that generated opposition from both parties, before the vote was taken, Johnson withdrew the nomination.
The Clinton nominees never made it to the Senate Floor, they were not sent to the floor because of opposition of members of the Judiciary committee, majority of the committee were Republicans.
Grassley- Results of last election when approval of judges important issue to the electorate, that the Democrats are now rejecting the will of the American people.
I'll donate to Grassley's campaign fund if he mentions daschle. LOL