legislation_cosponsors: 112-hr-6591, S000510

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	S000510	Rep. Smith, Adam [D-WA-9]	D	WA	2012-11-15	1