CAROLINE'S KID A KENNEDY OUTCAST!

Kin clamor for her to make him clam up

- 

Caroline Kennedy's son, Jack Schlossberg, could hurt her presidential ambitions, insiders warn

PROSPECTIVE power broker Caroline Kennedy's outraged family is threatening to withhold the dynasty's support for her presidential ambitions if she doesn't rein in her loose-cannon kid, tipsters tell GLOBE.

Former diplomat Caroline, 67 - the only surviving child of slain President John F. Kennedy - is getting an angry earful from her influential relatives about zipping the lips of her 32-year-old son, Jack Schlossberg, after his bizarre social media rants, sources spill.

"Jack has always been a handful," an insider jaws. "But now he's making an unseemly spectacle of himself! It's frankly embarrassing!"