legislation_cosponsors: 110-s-415, C001057

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	C001057	Sen. Coleman, Norm [R-MN]	R	MN	2007-07-11	0