legislation_cosponsors: 103-s-578, D000432

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
103-s-578	D000432	Sen. Dorgan, Byron L. [D-ND]	D	ND	1993-06-29	0