legislation_cosponsors: 115-sjres-52, D000622

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
115-sjres-52	D000622	Sen. Duckworth, Tammy [D-IL]	D	IL	2018-02-27	1