legislation_cosponsors: 115-hr-2983, B001301

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
115-hr-2983	B001301	Rep. Bergman, Jack [R-MI-1]	R	MI	2017-06-21	1