legislation_cosponsors: 115-s-3593, M001170

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
115-s-3593	M001170	Sen. McCaskill, Claire [D-MO]	D	MO	2018-10-11	1