legislation_cosponsors: 119-s-2859, K000393

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-2859	K000393	Sen. Kennedy, John [R-LA]	R	LA	2025-09-18	1