legislation_cosponsors: 99-s-2602, B001057

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
99-s-2602	B001057	Sen. Bumpers, Dale [D-AR]	D	AR	1986-06-26	1