Democratic presidential candidate Hillary Clinton is allegedly one of the most detested people under the protection of the Secret Service.

The First Family Detail, an explosive book by author Ron Kessler, reveals how both current and former agents strongly dislike being on Mrs Clinton's detail, while also revealing how they felt about protecting Chelsea Clinton and Bill Clinton.

In the book, Kessler presented Chelsea as someone who not only respected and appreciated her agents, but also was a model protectee.

The former president is described as a difficult chief executive who is also easygoing in the book.

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Democratic presidential candidate Hillary Clinton is allegedly one of the most detested people under the protection of the Secret Service

The First Family Detail, an explosive book by Ron Kessler, reveals how both current and former agents strongly dislike being on Mrs Clinton's detail

In the book, Hillary Clinton is exposed as being the complete opposite of her husband and daughter, and instead is reportedly very rude and acts nasty toward a number of agents

However, Hillary is exposed as being the complete opposite of her husband and daughter, and instead is reportedly very rude and acted nasty toward a number of agents.

'Hillary was very rude to agents, and she didn't appear to like law enforcement or the military,' former Secret Service agent Lloyd Bulman recalled to Kessler.

'She wouldn't go over and meet military people or police officers, as most protectees do.

'She was just really rude to almost everybody. She'd act like she didn't want you around, like you were beneath her.'

On another occasion, a member of the uniformed Secret Service once cheerfully greeted Mrs Clinton by saying 'Good morning, ma'am.'

'F— off,' is how she replied, according to Kessler's book.

Kessler explained in the book that when Mrs Clinton is in public, she smiles and acts graciously.

'As soon as the cameras are gone, her angry personality, nastiness, and imperiousness become evident,' he wrote.

'Hillary Clinton can make Richard Nixon look like Mahatma Gandhi.'

His book also revealed how Mrs Clinton allegedly didn't like the attire military aides wore.

'Hillary didn't like the military aides wearing their uniforms around the White House,' one former agent recounted to Kessler.

On one occasion, a member of the uniformed Secret Service once greeted Mrs Clinton by saying 'Good morning, ma'am.' 'F— off,' is how she replied, according to Kessler

'She asked if they would wear business suits instead.

'The uniform's a sign of pride, and they're proud to wear their uniform.

'I know that the military was actually really offended by it.'

Another Secret Service agent shared with Kessler that Mrs Clinton was never polite to the agents.

'We spent years with her,' the Secret Service agent said to the auther. 'She never said thank you.'

In another instance, a separate former Secret Service agent told Kessler that, 'if Hillary was walking down a hall, you were supposed to hide behind drapes used as partitions.'

Kessler's book also reveals how Mrs Clinton allegedly didn't like the attire military aides wore around the White House. She reportedly asked if they would wear business suits instead of their uniforms

While the former first lady was running for US Senate, Mrs Clinton stopped at an upstate New York 4-H Club, Kessler revealed in the best-selling book.

One Secret Service agents told him that Mrs Clinton saw cows and farmers and then erupted into anger.

'She turned to a staffer and said, 'What the f - - - did we come here for? There's no money here.''

Furthermore, Kessler noted that Secret Service 'agents consider being assigned to her detail a form of punishment.'

'In fact, agents say being on Hillary Clinton's detail is the worst duty assignment in the Secret Service,' he concluded in the book.

As a former investigative reporter with the Wall Street Journal and Washington Post, Kessler has also penned 19 other books.