legislation_cosponsors: 111-s-3990, S000663

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
111-s-3990	S000663	Sen. Snowe, Olympia J. [R-ME]	R	ME	2010-12-02	0