legislation_cosponsors: 119-hr-7540, J000311

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-hr-7540	J000311	Rep. Jack, Brian [R-GA-3]	R	GA	2026-02-25	0