legislation_cosponsors: 119-s-3588, K000384

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-3588	K000384	Sen. Kaine, Tim [D-VA]	D	VA	2026-01-07	1