legislation_cosponsors: 99-sres-206, K000019

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
99-sres-206	K000019	Sen. Kasten, Robert W., Jr. [R-WI]	R	WI	1985-07-30	1