legislation_cosponsors: 117-sres-91, W000805

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
117-sres-91	W000805	Sen. Warner, Mark R. [D-VA]	D	VA	2021-03-03	1