legislation_cosponsors: 119-sres-449, W000802

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-sres-449	W000802	Sen. Whitehouse, Sheldon [D-RI]	D	RI	2025-10-09	1