legislation_cosponsors: 119-hr-40, C001131

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-40	C001131	Rep. Casar, Greg [D-TX-35]	D	TX	2025-04-07	0