legislation_cosponsors: 119-hr-286, G000603

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-286	G000603	Rep. Gill, Brandon [R-TX-26]	R	TX	2025-03-18	0