legislation_cosponsors: 97-sjres-98, 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
97-sjres-98	D000401	Sen. Dole, Robert J. [R-KS]	R	KS	1981-07-15	1