legislation_cosponsors: 115-hr-5571, S000051

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-hr-5571	S000051	Rep. Sanford, Mark [R-SC-1]	R	SC	2018-04-18	1