legislation_cosponsors: 97-sres-390, D000185

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
97-sres-390	D000185	Sen. DeConcini, Dennis [D-AZ]	D	AZ	1982-05-11	1