That's how the U.S. Constitution is written, snowflake. It's designed to avoid one man causing the entire nation to get into a war we don't want to be in.
Spare me your Marine "tough guy" routine. Trust me when I tell you that you're talking to the wrong man. You need to get your faux jar-head out of your ass and realize that the U.S. Constitution is the supreme law of the land.
Congress would schedule an immediate emergency session in your desperate scenario and the president would receive 100% of the vote for war (and you know it). Not even the most ardent left-wing jack-ass is going to vote against action if Russian missiles had been launched on the U.S.
Do you know the flight time for a submarine-launched cruise missile launched off the east coast to Washington DC? I do!
By the time anyone got the word and started heading for the door, they would never need a nightlight because they would glow in the dark for whatever minutes or seconds they had to live if the initial blast did not kill them!
What if Congress was on recess in their home districts and states? What do you do then?
That is the type of idiocy you are proposing.
You need a user name change. Ignorant Patriot would be appropriate.