legislation_cosponsors: 110-hr-5645, F000339

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-hr-5645	F000339	Rep. Frank, Barney [D-MA-4]	D	MA	2008-03-14	1