legislation_cosponsors: 112-s-2221, V000127

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-s-2221	V000127	Sen. Vitter, David [R-LA]	R	LA	2012-03-21	1