legislation_cosponsors: 119-s-3142, K000377

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-s-3142	K000377	Sen. Kelly, Mark [D-AZ]	D	AZ	2025-12-02	0