The supplied article text does not contain the actual story about John Fetterman's ultimatum — it consists only of the page's headline and a list of unrelated Daily Mail sidebar links (covering topics such as the Iran conflict, UK politics and celebrity news). No details of what Fetterman has said or demanded, nor the reaction from fellow Democrats, are included in the text provided.

As a result, it is not possible to accurately summarise the substance of the report, its key figures, or the context behind the "internal frenzy" referenced in the headline without fabricating information not present in the source material. A reliable summary would require the full body text of the original article.