legislation_cosponsors: 109-s-1604, B000468

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
109-s-1604	B000468	Sen. Bingaman, Jeff [D-NM]	D	NM	2006-01-26	0