legislation_cosponsors: 117-sjres-9, D000618

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
117-sjres-9	D000618	Sen. Daines, Steve [R-MT]	R	MT	2021-02-25	1