legislation_cosponsors: 99-sjres-375, B001225

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
99-sjres-375	B001225	Sen. Bradley, Bill [D-NJ]	D	NJ	1986-09-17	1