legislation_cosponsors: 116-sres-559, H001075

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-sres-559	H001075	Sen. Harris, Kamala D. [D-CA]	D	CA	2020-05-05	1