Lawful Permanent Residents cannot vote in any federal election. Voting or registering to vote is a federal offense; one which can lead to imprisonment and/or deportation.
Permanent residents pay money to become such, and therefore should be extended the right to cast a ballot for who they believe should make decisions for them and this country.
Permanent residents also cannot call the Whitehouse comment line to leave a comment regarding this; another privileage extended only to an American Citizen.