legislation_cosponsors: 115-sres-404, C001071

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-sres-404	C001071	Sen. Corker, Bob [R-TN]	R	TN	2018-02-13	1