legislation_cosponsors: 112-hr-6444, M001142

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-6444	M001142	Rep. Matheson, Jim [D-UT-2]	D	UT	2012-09-20	1