legislation_cosponsors: 119-s-1538, S001181

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-1538	S001181	Sen. Shaheen, Jeanne [D-NH]	D	NH	2025-10-22	0