legislation_cosponsors: 97-sres-260, L000261

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
97-sres-260	L000261	Sen. Levin, Carl [D-MI]	D	MI	1981-12-11	1