legislation_cosponsors: 108-sres-155, S000059

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-155	S000059	Sen. Santorum, Rick [R-PA]	R	PA	2003-05-23	1