legislation_cosponsors: 112-hr-4306, B000410

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-4306	B000410	Rep. Berman, Howard L. [D-CA-28]	D	CA	2012-04-27	0