legislation_cosponsors: 119-hres-784, C001055

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-hres-784	C001055	Rep. Case, Ed [D-HI-1]	D	HI	2025-09-30	1