legislation_cosponsors: 115-hr-4202, K000381

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-hr-4202	K000381	Rep. Kilmer, Derek [D-WA-6]	D	WA	2018-06-08	0