legislation_cosponsors: 108-sres-293, D000407

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
108-sres-293	D000407	Sen. Domenici, Pete V. [R-NM]	R	NM	2004-01-28	1