legislation_cosponsors: 119-sconres-15, B001319

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-sconres-15	B001319	Sen. Britt, Katie Boyd [R-AL]	R	AL	2025-06-18	1