legislation_cosponsors: 115-hres-974, C001049

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-hres-974	C001049	Rep. Clay, Wm. Lacy [D-MO-1]	D	MO	2018-06-28	1