As the time draws near to officially place names on the fall ballot, a New York state judge has dealt a blow to Robert F. Kennedy Jr.’s independent presidential campaign.

Justice Christina L. Ryba said that the address that Kennedy listed as a residence on his nominating petitions in the state – 84 Croton Lake Road, Katonah, N.Y. – was a “sham” that he used only to maintain his voter registration and to further his political aspirations.

The ruling, which still may be appealed, will remove Kennedy from the New York ballot and could result in his removal from other states’ ballots as well.

Research shows that two other people use 84 Croton Lake Road as their address – Timothy Haydock and Barbara Moss. Haydock, an emergency room doctor, testified in a 2012 trial that he became friends with the Kennedy family in the late 1960s. Moss, his wife, has owned the property since 1991 and testified earlier in the month that Kennedy rents a room from her for $500 per month, although there is no formal lease.

The challengers to RFK Jr.’s petitions argued that his actual residence was in Los Angeles in a home that he shares with his wife, actress Cheryl Hines.

“Judge Ryba’s ruling is an assault on New York voters who signed in record numbers to place me on their ballot,” said Kennedy in a press statement. “The Democratic Party is unrecognizable to me. The party of my father and uncle’s time was committed to expanding voters’ rights and understood that competition at the ballot box is an essential part of American Democracy. The DNC is now a party that uses lawfare in place of the democratic election process.”

“[RFK Jr.] doesn’t think the rules apply to him and he refuses to consider the consequences of his actions,” DNC spokesperson Matt Corridoni said in a statement after the ruling.

“That is why he is willing to play the role of spoiler for Donald Trump in this election and why he has floated endorsing Trump in exchange for a job in a Trump administration.”

More than a half-dozen states have seen challenges to Kennedy’s petitions from both Democrats and other allies.

In Pennsylvania, a legal challenge was filed last Thursday, arguing that the nominating papers filed by Kennedy and running mate Nicole Shanahan “demonstrate, at best, a fundamental disregard” of state law and the process by which signatures are gathered.

It claims Kennedy’s paperwork includes “numerous ineligible signatures and defects” and that documents are torn, taped over and contain “handwriting patterns and corrections suggestive that the indicated voters did not sign those sheets.”

An attorney for Kennedy said the challenge contained specious allegations. A court will conduct an evidentiary hearing next Tuesday in Harrisburg.