legislation_cosponsors: 115-sres-171, B000575

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-sres-171	B000575	Sen. Blunt, Roy [R-MO]	R	MO	2017-05-17	1