legislation_cosponsors: 119-hr-945, C001066

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-945	C001066	Rep. Castor, Kathy [D-FL-14]	D	FL	2025-02-04	1