legislation_cosponsors: 100-hconres-376, O000006

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-hconres-376	O000006	Rep. Oberstar, James L. [D-MN-8]	D	MN	1988-10-21	0