legislation_cosponsors: 111-s-4031, B000611

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
111-s-4031	B000611	Sen. Bond, Christopher S. [R-MO]	R	MO	2010-12-15	1