legislation_cosponsors: 110-s-3585, C001035

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
110-s-3585	C001035	Sen. Collins, Susan M. [R-ME]	R	ME	2008-09-25	1