legislation_cosponsors: 110-hr-7310, W000215

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
110-hr-7310	W000215	Rep. Waxman, Henry A. [D-CA-30]	D	CA	2008-12-09	1