legislation_cosponsors: 112-hres-460, B001259

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-hres-460	B001259	Rep. Braley, Bruce L. [D-IA-1]	D	IA	2012-02-15	0