legislation_cosponsors: 113-s-2972, C000174

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
113-s-2972	C000174	Sen. Carper, Thomas R. [D-DE]	D	DE	2014-12-03	1