legislation_cosponsors: 99-hr-4945, B000644

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
99-hr-4945	B000644	Rep. Borski, Robert A. [D-PA-3]	D	PA	1986-06-25	0