legislation_cosponsors: 119-hr-5309, L000601

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-5309	L000601	Rep. Landsman, Greg [D-OH-1]	D	OH	2026-03-03	0