legislation_cosponsors: 114-hr-2188, L000570

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
114-hr-2188	L000570	Rep. Lujan, Ben Ray [D-NM-3]	D	NM	2015-04-30	1