legislation_cosponsors: 99-sres-144, M000635

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-sres-144	M000635	Sen. Melcher, John [D-MT]	D	MT	1985-04-26	1