BIDEN

Set to 4 different clues across 5 published puzzles, most often “Delaware senator” — The New York Times, Sunday, 14 January 2001.

5 letters

Every clue on record, most used first

Delaware senator2 times
The New York Times — Sunday, 14 January 2001
Cheney's successor as vice presidentonce
The New York Times — Tuesday, 5 May 2009
1987-95 Senate Judiciary Committee headonce
The New York Times — Saturday, 17 November 2001
Joseph of the Senateonce
The New York Times — Wednesday, 22 December 1993