USA Trump is famous as the US president with many surprising and unpredictable decisions.

For all US presidents, the gap between the picture they want to show the world and the chaos and reality in the White House always exists.

Besides the "pink pictures" Trump wanted to paint, John F. Harris, a commentator for Politico, said there was a secret picture about him that had not been discovered.

Harris always wondered what the picture was like and what secrets Trump kept.

The first hint Harris got was about Trump's "non-political" background.

Historians who want to rebuild Trump's administration will need a lot of time and effort to understand the "unprecedented nature of an entrepreneurial president", according to Jonathan Karp, CEO of Simon Publishing Company.

Trump was elected president in 2016 thanks in part to the success of a successful businessman with an enormous fortune.

Many doubts about Trump's business career were also raised: how much of Trump's net worth is and whether it fits his claims;

Before Trump, President Bill Clinton was also investigated by an independent prosecutor, for relatively small business transactions made more than 10 years before he entered the White House.

"We will eventually find out everything they do, even their taxes. The answers to questions we don't know are in their heads," said Mary Jordan, Washington Post correspondent.

In addition to its vast wealth, Russia is also a problem that many people doubt about Trump.

Peter Baker, a NYTimes correspondent, who has written books about the presidencies of father and son Bush, Obama and Clinton, confirms Muller's investigation is very important, helping to clarify the relationship between Trump and the President of Russia

Commentator Harris said there are many questions on this issue that need to be clarified, such as the reason why Russia promotes attacks on the email of Hillary Clinton, as well as propaganda on social networks, creating additional advantages.

"We still have a lot of questions still unexplained," Baker said.

According to Harris, Trump's private life is also a mysterious issue for many people.

However, the book also emphasizes that people still know very little about Trump, like personal relationships, as well as what he likes to do when not watching television or on Twitter.

Jordan said she was shocked to learn that Trump often has a lot of time alone and "has no real friends".

Presidents always have secret records that they want to hide as long as possible, because they often contain so many stories about their terms.

In addition, the record on the true role of Vice President Mike Pence, or senior officials, and many jobs related to important policies or regulations, can also become an issue.

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US President Donald Trump on June 13 went to West Point Military Academy in New York State to congratulate the newly graduated army officers.

Many also questioned whether the surprise trip to Walter Reed Army Medical Center last November was related to Trump's health.

Trump always tries to erase the weak image and prove he is both physically and mentally okay.

"Trump is very good at keeping us focused on the tip of the iceberg. I'm not saying he is hiding a big part, but there are obviously a lot of things we don't know yet," historian Jon Meacham said.