legislation_cosponsors: 114-sres-641, F000062

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-641	F000062	Sen. Feinstein, Dianne [D-CA]	D	CA	2016-12-10	1