The New York Republican Committee on Thursday afternoon in a statement said the party is “completely united” by the congressional campaign of Sen. Jack Martins after his sole rival for the nomination was denied the GOP ballot line ahead of the June primary.

The race for the third congressional district on Long Island is expected to be among the top battleground races this fall.

“Today brings more bad news for Democrats as they are one step closer to losing Steve Israel’s congressional seat this year. The Republican Party is completely united behind Jack Martins, while Democrats will face a divisive inter-party battle for the nomination,” the New York Republican Committee said in the statement.

“This will be one of the top 10 races to watch in the country, and with Jack Martins as our nominee, we will win this seat and grow our Republican Majority in the House.”

The statement comes after Philip Pidot’s petitions for the Republican primary were rejected by the state Board of Elections.

Pidot’s campaign has vowed to fight the ruling.

Updated — The Pidot campaign responded in a statement.

“There was never a question that Jack Martins was the machine-backed candidate in this race,” said spokesman Jerry McKinstry. “The question is whether that’s a good or bad thing with Republican voters in NY3. Flip Pidot will be on that June 28 ballot, and he’ll be offering a conservative reform alternative to the business-as-usual candidate.”