Book claims to detail Hillary Clinton's 'mounting health issues'

Nearly a year before Hillary Clinton abruptly left a ceremony commemorating the 15th anniversary of the 9/11 attacks due to "overheated," a book claimed she is facing "mounting health issues."

In the book "Unlikeable — The Problem with Hillary" author Edward Klein claims the former secretary of state is "frequently plagued" by "blinding headaches" and has experienced multiple strokes over the course of the campaign.

Klein claims the book takes advantage of "unprecedented access to longtime associates of the Clintons and the Obamas," and provides information on "conversations and details of Hillary Clinton's behind-the-scenes plotting."

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Sunday's episode comes amid heightened concerns from some critics who suggest the 68-year-old presidential candidate may be suffering health issues, citing repeated coughing spells on the campaign trail.

The former secretary of state's personal physician released a letter in July describing her as being in "excellent health" and "fit to serve."

"Unlikeable — The Problem with Hillary" was released in September, 2015.

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