The specter of a $100 million libel suit scared CNN into retracting a poorly reported story that slimed an ally of President Trump’s — and forcing out the staffers responsible for it, The Post has learned.

The cable network’s coverage of Trump transition-team member Anthony Scaramucci came amid federal scrutiny of corporate parent Time Warner’s pending purchase by AT&T— and the widespread belief among media execs that CNN President Jeff Zucker can’t survive a merger.

CNN immediately caved after Scaramucci, a financier and frequent network guest, cried foul and threatened to take legal action, sources said Tuesday.

Scaramucci got an unusual public apology but still hired a top Manhattan lawyer to put further pressure on CNN and “look after [his] interests in this matter,” one source said.