Sen. John Fetterman, D-Pa., and Pennsylvania Gov. Josh Shapiro arrive to speak during a Democratic National Committee (DNC) rally in Philadelphia. (Getty Images)
The hearing was part of the Pennsylvania’s Board of Pardons meeting when Shapiro expressed concerns that transcripts from the siblings’ original trial were missing, Fetterman wrote in the memoir, titled: "Unfettered."
In response, Fetterman became angry. At one point during a private meeting, he threatened to run for governor in 2022 and pull Shapiro into a primary.
"I told him there were two tracks — that one and the one in which he ran for governor and I ran for the Senate (which was the one I preferred)," Fetterman wrote in his new book, "Unfettered," as excerpted by The Philadelphia Inquirer.
"I had no interest in friction, only in what I felt was justice," he added.
The book reportedly details how Shapiro's people reached out to Fetterman.
"He wanted me to retract things I had said and to deny the rumors about the private meeting taking place," Fetterman wrote. "That wasn’t going to happen."
In December 2020, the board voted to commute the Hortons’ sentences. Fetterman eventually invited Dennis Horton to be his guest at the 2023 State of the Union address.
FETTERMAN SAYS HE KNOWS AND LOVES TRUMP VOTERS: 'I'M THE ONLY DEMOCRAT IN MY FAMILY'
Pennsylvania Gov. Josh Shapiro speaks at the Celebration of Freedom Ceremony during a "Wawa Welcome America" event on July 4, 2023, in Philadelphia. (Gilbert Carrasquillo/GC Images)
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Fox News Digital has reached out to Shapiro's office for comment.
On Capitol Hill, Fetterman has clashed with his fellow Democrats because of his stance on working with the Trump administration and his support for Israel.
Louis Casiano is a reporter for Fox News Digital. Story tips can be sent to louis.casiano@fox.com.
https://www.foxnews.com/politics/fettermans-new-book-details-explosive-feud-gov-josh-shapiro-over-parole-board-dispute