legislation_cosponsors: 109-sres-243, A000121

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-sres-243	A000121	Sen. Allen, George [R-VA]	R	VA	2005-09-15	1