Thomas Jefferson didn’t have thermonuclear weapons deliverable by ICBMs from land or beneath the sea.
Neither did our enemies. All the more reason you can’t always wait for a DOW. I can just imagine it now...Trump has hard intelligence that NK is about to launch a nuke strike against us. He can strike first or go to congress and ask for a DOW.
You are simultaneously arguing for “following the constitution”, while also arguing that modern warfare doesn’t allow it. Your only consistancy is in being wrong.