Nicholas Skulstad, 34, pleaded guilty to violence and destruction of a motor vehicle for a 2021 incident in Ossining.
The U.S. Attorney's Office says when police officers responded, Skulstad charged at them and threatened them, and had a notebook in his car with a list of public figures to kill.
Skulstad was sentenced to time served with three years of supervised release.
That includes nine months of either home detention or in-patient treatment.
He also has to pay $8,500 for the damage to the MTA vehicle.