legislation_cosponsors: 112-hr-6591, 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
112-hr-6591	L000570	Rep. Lujan, Ben Ray [D-NM-3]	D	NM	2012-11-15	1