legislation_cosponsors: 99-hr-5237, B000711

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-5237	B000711	Rep. Boxer, Barbara [D-CA-6]	D	CA	1986-08-12	0