The claim that a former Fox News host is 'spiraling out of control' and described as 'manic' by staffers is unverified because none of the provided sources contain any direct or corroborated reports supporting this specific characterization or recent behavioral description.
The former Fox News host is reportedly spiraling out of control, being described by staffers as “manic.”

MTG slams Fox News host who called her ‘an absolute lunatic with an IQ of a snail’ - The Independent
Source: the-independent.com
Key Evidence
mentions Fox News executives calling Jeanine Pirro a 'reckless maniac,' but this is a different context and does not confirm manic behavior.
npr.orgnpr.orgFox News execs called Jeanine Pirro 'reckless maniac' and more : NPR
None of the other sources (including ) report on any former Fox News host exhibiting manic behavior or spiraling out of control.
the-independent.comthe-independent.comMTG slams Fox News host who called her ‘an absolute lunatic with an IQ of a...
npr.orgnpr.orgWho did a Fox News executive call a 'reckless maniac'? Find out in the quiz :...+1 more
The absence of any direct quotes or verified reports from staffers in these sources means the claim cannot be substantiated.
What the Evidence Shows
The search results and sources provided do not include any direct references to a former Fox News host being described as 'manic' or 'spiraling out of control' by staffers. Several sources discuss controversies involving Fox News personalities, internal criticisms, or disputes (e.g., Fox News executives calling Jeanine Pirro a 'reckless maniac' in ), but these do not confirm the claim about a former host's mental state or behavior.npr.orgnpr.orgFox News execs called Jeanine Pirro 'reckless maniac' and more : NPR
Other sources focus on political feuds, workplace culture, or historical controversies without mentioning manic behavior or spiraling out of control. The NPR quizzes and opinion pieces do not provide factual evidence for this claim either.
Therefore, the statement remains unsupported by the available evidence.