legislation_cosponsors: 99-s-277, M001085

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-s-277	M001085	Sen. Murkowski, Frank H. [R-AK]	R	AK	1985-01-24	1