legislation_cosponsors: 100-sres-246, P000553

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
100-sres-246	P000553	Sen. Proxmire, William [D-WI]	D	WI	1987-09-16	0