legislation_cosponsors: 106-sconres-63, W000154

Cosponsors for tracked legislation. Distinguishes original cosponsors (signed on at introduction) from later additions. Linked to congress_members via bioguide_id.

This data as json

bill_id	bioguide_id	full_name	party	state	sponsorship_date	is_original_cosponsor
106-sconres-63	W000154	Sen. Warner, John [R-VA]	R	VA	1999-10-29	1