legislation_cosponsors: 110-hconres-393, L000111

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
110-hconres-393	L000111	Rep. Latham, Tom [R-IA-4]	R	IA	2008-09-22	0