The President does retain the sole right to authorize the use of nuclear weapons and is constantly accompanied by a special military officer who carries the "
nuclear football.
key word being NATIONAL EMERGENCY
unless of course theres time to assemble congressional leaders, call role, present the facts, debate the facts, and finally vote on the facts ... given the fact the actual facts dont become a partiasn piss fest requiring further debate in both chambers.
but then it wouldnt be an EMERGENCY would it?