A judge has ruled that independent presidential candidate Robert F. Kennedy Jr. falsely claimed a New York residence on nominating petitions, invalidating the documents he needs to appear on the ballot in the state.

A judge ruled Monday that independent presidential candidate Robert F. Kennedy Jr.’s name should not appear on New York’s ballot, saying that he falsely claimed a New York residence on nominating petitions despite living in California.

The scion of the famed Democratic political dynasty vowed to appeal, dismissing the ruling as partisan. If the judge’s decision is upheld, it would not only keep Kennedy off the ballot in New York but could also lead to challenges in other states where he used an address in New York City’s suburbs to gather signatures.