Where in the Constitution (the source of any relevant "law and order" on this issue) does it state that the CIC cannot warn a potential threat (however ineloquently) that the US will respond militarily -if attacked-? His comment didn't come out of the blue, he was responding to repeated and escalating threats by North Korea. You'll note General Mattis, who does speak with clarity and sobriety, said much the same thing in his own way. Congress' power to declare war does not subsume nor supercede the authority of the President to respond to attack, nor to speak about doing so.

It would help the quality of our political discussions if those who hate Trump could restrain their emotional responses and instead think and speak rationally. Would have helped for the past 3 Presidencies, in fact.