legislation_cosponsors: 119-hr-7531, L000560

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-7531	L000560	Rep. Larsen, Rick [D-WA-2]	D	WA	2026-02-12	1