Jack Schlossberg has a skeleton clad in clothes from his slain presidential grandfather John F. Kennedy in his home — and a bizarre reason for keeping the macabre display.

“I had a back injury, and I had to kind of relearn how to walk and stand up straight,” the 33-year-old Kennedy scion told CBS News in a recent interview about his Manhattan run for Congress.

“So at the time, I wanted to study and visualize posture on my bones,” Schlossberg said, gesturing at the skeleton, which wore a dressing robe and hat, in his home.

“Then I was given a robe, a hand-me-down robe from my grandpa, and then I kind of put the robe on him, and I realized, ‘Oh, my God, now I can ask him questions. And we can talk,’ ” he said.

Schlossberg also said his tragic grandfather “killed the hat industry” — referring to JFK’s preference to go hatless during his presidency, tanking an industry that fueled a longtime fashion staple at the time.

“I’m making him wear it now,” Schlossberg said of the skeleton’s hat.

“I think it’s a dressing robe,” he said of the other garment. “And this is his hat, which I think he didn’t wear very often, but he wore it sometimes.”

Schlossberg — who is running for New York’s 12th congressional district — frequently evokes his famous grandfather during the campaign.

“My name is Jack, or John Bouvier Kennedy Schlossberg if you want to know the whole thing,” he wrote in a March campaign email asking for donations.

“Lately, I’ve been doing some reflecting on my grandfather, President John F. Kennedy, and his legacy of hope. In my run to fight for NY-12 in Congress, and just as a person, that’s what I want to focus on: hope,” he said.

Schlossberg — whose mother is Caroline Kennedy, JFK and Jacqueline Bouvier Kennedy Onassis’s daughter — is running against numerous candidates vying for the June Democratic primary to take the seat of Rep. Jerry Nadler after the longtime congressman retires from office.

“I know I have big shoes to fill. In my grandfather’s memory, I’ve led a life of caring about this a lot,” Schlossberg claimed in the email. “I put that care and effort and hope into everything I do. But this is bigger than me. It’s bigger than my family’s legacy.”

The Kennedy candidate is known for his cringy and sometimes downright bizarre online antics.

Before announcing his bid for office, he trolled his uncle, Health and Human Services Secretary Robert F. Kennedy Jr., by writing up a “recipe” for RFK Jr.’s Make America Healthy Again push.

Schlossberg called it an “energy ball” cocktail, which included “2 oz of Jew blood (ashkenazi not Sephardic). 4 cups of male j–z. Baked at 300 degrees until totally dry like your wife,” referring to RFK Jr.’s wife, actress Cheryl Hines.

He also donned a wig to mock First Lady Melania Trump and claimed he and Second Lady Usha Vance were “having a baby” and “might get married” — posting his head on a baby as if she were holding it.