legislation_cosponsors: 109-hr-4580, C001046

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
109-hr-4580	C001046	Rep. Cantor, Eric [R-VA-7]	R	VA	2005-12-16	1