legislation_cosponsors: 112-hr-3574, M000309

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
112-hr-3574	M000309	Rep. McCarthy, Carolyn [D-NY-4]	D	NY	2011-12-09	0