legislation_cosponsors: 100-sjres-95, D000018

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
100-sjres-95	D000018	Sen. D'Amato, Alfonse [R-NY]	R	NY	1987-03-17	1