legislation_cosponsors: 115-s-3615, B001277

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-3615	B001277	Sen. Blumenthal, Richard [D-CT]	D	CT	2018-11-14	1