legislation_cosponsors: 115-hconres-17, B001270

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-hconres-17	B001270	Rep. Bass, Karen [D-CA-37]	D	CA	2017-02-01	1