legislation_cosponsors: 119-s-2197, G000555

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-2197	G000555	Sen. Gillibrand, Kirsten E. [D-NY]	D	NY	2025-06-26	1