legislation_cosponsors: 112-hr-4017, R000462

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-4017	R000462	Rep. Rothman, Steven R. [D-NJ-9]	D	NJ	2012-02-29	0