legislation_cosponsors: 113-s-3009, R000361

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-3009	R000361	Sen. Rockefeller, John D., IV [D-WV]	D	WV	2014-12-12	1