legislation_cosponsors: 112-hr-5646, R000591

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-5646	R000591	Rep. Roby, Martha [R-AL-2]	R	AL	2012-05-08	1