Former state Senate Majority Leader Dean Skelos and his son on Thursday said FBI leaks in the prosecution of a Las Vegas gambler strengthened their claim that the feds​ also leaked secret grand-jury information about them.

Defense lawyers cited a “litany of newspaper articles” — including in The Post — that revealed “virtually every aspect of the grand jury proceedings” against the Skeloses, ranging from the identity of witnesses to the likelihood of their indictment on corruption charges.

The Manhattan federal court filing concedes that Judge Kimba Wood denied Dean and Adam Skelos a hearing on those claims before they were convicted in 2015, then granted a new trial on appeal.

But court papers say recent government admissions that the FBI’s New York Office “systematically” leaked information about gambler Billy Walters required Wood “to determine the full extent of the government’s misconduct and to fashion an appropriate remedy.”

Walters was sentenced last year to five years in prison following his jury conviction for scamming $32 million through an inside-trading scheme that included a tip to pro golfer Phil Mickelson, who wasn’t charged.

The Skeloses’ retrial on conspiracy, extortion and bribery​ charges​ is set for June 18.

The Manhattan US Attorney’s Office declined to comment.