legislation_cosponsors: 119-s-1965, R000608

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-1965	R000608	Sen. Rosen, Jacky [D-NV]	D	NV	2025-06-05	1