FILE -- In this Aug. 12, 2016 file photo Kimberly Rhode of the United States smiles after she won the bronze medal match of the women's skeet event at Olympic Shooting Center at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Rhode, who has medaled in six straight Olympic Games, is the star plaintiff in a lawsuit to stop a 2016 voter-approved ballot initiative requiring background checks for the purchase of ammunition that is to take effect July 1. (AP Photo/Eugene Hoshiko, File)