legislation_cosponsors: 110-s-415, H001028

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-s-415	H001028	Sen. Hagel, Chuck [R-NE]	R	NE	2007-04-10	0