legislation_cosponsors: 101-sres-326, R000249

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-326	R000249	Sen. Riegle, Donald W., Jr. [D-MI]	D	MI	1990-09-20	1