I'll make it short and sweet. If the incident at Cranbrook School occurred today, he would commit Felony Assault. As a matter of fact, in some states like California, it might have also triggered a hate crime enhancement.
An attorney I am acquainted with:
The number involved makes it mob action, a deadly weapon was employed, and actually brought into contact with the victim. The passage of time from the first attested out-cry against the victim establishes pre-meditation and criminal mind, and the attested statement establishes the animus against a group required for a hate-crime enhancement.
Most places he ought to be looking at six or so years....
Mitt Romney was not a prankster, he was a criminal.