legislation_cosponsors: 119-sconres-25, S000148

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-sconres-25	S000148	Sen. Schumer, Charles E. [D-NY]	D	NY	2026-01-08	1