legislation_cosponsors: 101-sres-14, 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
101-sres-14	D000018	Sen. D'Amato, Alfonse [R-NY]	R	NY	1989-01-25	1