legislation_cosponsors: 101-sjres-75, D000401

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-sjres-75	D000401	Sen. Dole, Robert J. [R-KS]	R	KS	1989-03-09	1