legislation_cosponsors: 109-s-2231, C000567

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-2231	C000567	Sen. Cochran, Thad [R-MS]	R	MS	2006-02-07	0