legislation_cosponsors: 119-s-1547, B001277

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-1547	B001277	Sen. Blumenthal, Richard [D-CT]	D	CT	2025-07-14	0