legislation_cosponsors: 119-hr-5497, S001213

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-hr-5497	S001213	Rep. Steil, Bryan [R-WI-1]	R	WI	2025-09-18	1