legislation_cosponsors: 114-sres-409, M001153

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-sres-409	M001153	Sen. Murkowski, Lisa [R-AK]	R	AK	2016-03-17	1