legislation_cosponsors: 110-hr-5472, B001234

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-5472	B001234	Rep. Baca, Joe [D-CA-43]	D	CA	2008-03-03	0