legislation_cosponsors: 112-hconres-87, R000581

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-hconres-87	R000581	Rep. Richardson, Laura [D-CA-37]	D	CA	2012-03-05	0