legislation_cosponsors: 119-s-2127, W000817

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
119-s-2127	W000817	Sen. Warren, Elizabeth [D-MA]	D	MA	2025-06-18	1