legislation_cosponsors: 115-hr-2989, C001106

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-2989	C001106	Rep. Costello, Ryan A. [R-PA-6]	R	PA	2017-07-11	0