legislation_cosponsors: 110-hr-5575, M000133

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-5575	M000133	Rep. Markey, Edward J. [D-MA-7]	D	MA	2008-03-11	1