And now more than ever, he’s finding himself on the receiving end of harsh criticism from current and past colleagues. For many who know Weaver, the bottom line is that working with him seldom ends well for the candidates or other staffers.

“Now only four months into it, nearly a dozen highly qualified, talented, and dedicated senior staffers have all quit, in large part, if not totally, because of the way they were treated by one person, John Weaver,” campaign and White House veteran Spencer Geissinger told The Daily Caller…

Current and former campaign insiders told TheDC of multiple incidents where individuals who have worked with Weaver warned Huntsman and his family about Weaver’s spending and irrational behavior.

Several sources told TheDC that Sen. John McCain himself directly warned Huntsman not to hire Weaver…

“Weaver is a miserable son of a bitch,” one campaign insider told TheDC. ”I’ve never come across anyone like him.”

That insider went on to call Weaver “divisive, narcissistic, unprofessional, and in my view unethical.”