According to the Constitution of the State of New Jersey, Article II, paragraph 6:
No idiot or insane person shall enjoy the right of suffrage.
Why are constitutional articles labelled with Roman numerals? Makes it sound like the Super Bowl or something.
The state appellate court did rule a few years ago that being hospitalized for psychiatric treatment does not constitute being insane for the purpose of determining voter eligibility.
Today is Election Day in the United States. Don't forget to vote! (Void where prohibited.)