legislation_cosponsors: 110-s-3406, J000177

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-3406	J000177	Sen. Johnson, Tim [D-SD]	D	SD	2008-07-31	1