John F. Kennedy’s grandson, Jack Schlossberg, made his name spreading wild comments on social media — including with a series creepy posts aimed at second lady Usha Vance. Schlossberg, who announced he’s running for Congress in New York’s 12th District, bizarrely joked that he’s “having a son” with JD Vance’s wife, professed his “love” for her and compared her “hotness” to his own grandmother, Jacqueline Kennedy Onassis. The 32-year-old former Vogue political correspondent — who has more than 1.