legislation_cosponsors: 113-hr-4148, B000574

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
113-hr-4148	B000574	Rep. Blumenauer, Earl [D-OR-3]	D	OR	2014-04-01	0