legislation_cosponsors: 114-sconres-56, M001176

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
114-sconres-56	M001176	Sen. Merkley, Jeff [D-OR]	D	OR	2016-11-29	1