legislation_cosponsors: 119-hr-7531, M001214

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	M001214	Rep. Mrvan, Frank J. [D-IN-1]	D	IN	2026-02-12	1