The ad by McEachin, of Henrico County, accuses his two leading rivals, Del. Whittington W. Clement, of Danville, and state Sen. John S. Edwards, of Roanoke, of being cozy with gun rights groups such as the National Rifle Association. Both have criticized the ad -- which shows news coverage of the shooting at Columbine in 1999 -- as a mischaracterization of their records