legislation_cosponsors: 113-sres-177, R000595

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-177	R000595	Sen. Rubio, Marco [R-FL]	R	FL	2013-06-19	1