legislation_cosponsors: 114-s-435, L000577

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-s-435	L000577	Sen. Lee, Mike [R-UT]	R	UT	2015-02-10	1