legislation_cosponsors: 99-sres-174, C000877

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-174	C000877	Sen. Cranston, Alan [D-CA]	D	CA	1985-06-21	0