legislation_cosponsors: 112-sres-599, T000461

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-sres-599	T000461	Sen. Toomey, Patrick [R-PA]	R	PA	2012-11-15	1