John Ensign

Score: 3

Evidence:
http://thinkprogress.org/2009/12/23/demint-tenther/ - (12/23/09)

http://thinkprogress.org/2009/09/29/ensign-guns-autos/ - (9/29/09)

http://thinkprogress.org/2009/09/25/ensign-constitution/ - (9/25/09)