The response from Party Secretary to such an attack would be a strongly worded letter, with a finger wag. More likely, a call for the American people to do some introspective navel gazing to consider how this was all America’s fault. FUBO!
Back during another era, such a ship in international waters but close enough would be shadowed by a US Navy destroyer, occasionally painting the target. Not to the point like the Soviet Navy would do the “bump and grind” in the Mediterranean, but close enough. Add the hourly buzzing by patrol aircraft. But this is a new era.
Such a response would simply necessitate the immediate removal of all cowards from the government, so I give that theory little credence, and I factor in the historical records of lefties who love to wage war. Iran would be doomed, and it knows it.
In any case, that joke of a “fleet” will be lucky to survive the elements if it attempts to cross the Atlantic and back. The whole pony show is for internal consumption in Iran and that should be blatantly obvious.