A physics lab accidently finds a way to explode guns, ammo, and explosives at a distance. The final machine is called "The Trigger." As soon as the President lets people know it exists, opposition pours in from all sides -- the military doesn't want to give up guns & explosives, people don't trust the Trigger, and their NRA (NAR) is full of drooling fanatics. There's a lot of this kind of group stereotype.
The scientists have partial stories here and there, but this is really about how politics and people deal with big changes. The last couple of chapters are tense. I think the book should have been about half the size, tightened up, and more accurately researched. I don't think I'll read it again.