legislation_cosponsors: 110-hres-18, M001139

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-hres-18	M001139	Rep. Miller, Gary G. [R-CA-42]	R	CA	2007-01-05	0