legislation_cosponsors: 119-hr-2021, S001215

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-2021	S001215	Rep. Stevens, Haley M. [D-MI-11]	D	MI	2025-03-10	1