Washington has some of the strictest gun control laws in the nation. One former resident who now owns a gun store in Idaho warns it could happen to other states.

Authorities have said a bullet struck the brim of a baseball-style cap worn by a Boise, Idaho, police officer who exchanged gunfire with the gunman in Monday’s shooting at the city’s largest ...

Congress last month passed its first major gun legislation in nearly 30 years — over the objections of every member of Idaho’s congressional delegation — and it will bring some changes in ...