legislation_cosponsors: 116-s-4973, C001056

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
116-s-4973	C001056	Sen. Cornyn, John [R-TX]	R	TX	2020-12-08	1