legislation_cosponsors: 110-hres-18, C001064

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	C001064	Rep. Campbell, John [R-CA-48]	R	CA	2007-04-19	0