legislation_cosponsors: 113-sres-494, C000567

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-sres-494	C000567	Sen. Cochran, Thad [R-MS]	R	MS	2014-06-26	1