legislation_cosponsors: 112-hres-820, L000557

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-hres-820	L000557	Rep. Larson, John B. [D-CT-1]	D	CT	2012-11-28	1