legislation_cosponsors: 112-hr-6728, R000011

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
112-hr-6728	R000011	Rep. Rahall, Nick J., II [D-WV-3]	D	WV	2013-01-01	1