7 Trump is one of the least charitable billionaires in the world and donated $3.7 million to his own charity over a period of 20 years, which is less than what WWE donated to his charity in 2007 alone. 

The World Wrestling Entertainment gave a total of $5 million to Trump’s foundation, $4 million for his help in promoting that year’s WrestleMania festivities in 2007 and $1 million for when he was going to buy part of the WWE empire in 2009. Compared to many other billionaire tycoons such as Bill Gates, Warren Buffett or Michael Bloomberg, Trump’s contributions to charity are unbelievably small. Bloomberg’s contributions in 2008 alone totaled $235 million, Larry Ellison’s $73.2 million, and Johnny Carson left his charitable foundation $156 million.(source)

8 Donald Trump tried to sue an author for $5,000,000,000 because he called Trump a millionaire instead of a billionaire.

In 2009, Trump filed a lawsuit against the author of the book TrumpNation: The Art of Being Donald, Timothy O’Brien, for $5 million. In the book the author cited three unnamed sources who estimated Trump’s net worth between $150 million and $250 million. However, the court ruled that Trump was not able to prove that the author committed “actual malice” and dismissed the defamation lawsuit. According to Trump’s lawyers, his own estimation has been “proven conclusively” to exceed $7 billion, yet during a deposition, he himself said that his sense of financial worth depends on his day-to-day feelings.(source)

9 Trump dislikes shaking hands with other people and is a self-professed germophobe. 

It isn’t just the hands of other people that Trump doesn’t want to touch, but everything that is touched or used by anyone else. He doesn’t even like to push the ground floor elevator button because it would have been pushed my many people. And apparently, he specifically avoids touching the hands of teachers because they are very likely to have been in physical contact with kids.(source)

10 The character Biff Tannen from the Back to the Future trilogy was based on Donald Trump.

In the trilogy, Biff Tannen, portrayed by actor Thomas F. Wilson, is a towering, violent and selfish bully who intimidates and cheats to get what he wants. Recently, after renewed interest in Back to the Future II, numerous commentators noted similarities between the older version of Biff Tannen and Donald Trump. When the writer Bob Gale was asked about these similarities, he replied that they were intentional and that the character was indeed based on Donald Trump, who was already well-known in the late 1980s for his real estate business.(source)

11 In 1990, Trump threatened to sue the stock broker firm Janney Montgomery Scott after an analyst said Trump Taj Mahal wouldn’t survive financially. The analyst was fired for it and later the same year Taj Mahal declared bankruptcy. 

Marvin Roffman, a veteran securities analyst focused on the gaming industry in Atlantic City, told a reporter from the Wall Street Journal that the lavish and financially shaky nature of Trump’s third casino Trump Taj Mahal would fail. In reaction to that Trump threatened to sue his employer and demanded that Roffman be fired. Roffman stood by his assessment and three days after the the Journal was out he was fired. Roffman later filed a lawsuit against Trump for using intimidation and forceful warnings of litigation, and had a clear victory.(source)

12 The companies owned by Trump filed for bankruptcy four different times. 

All the four bankruptcies filed were related to over-leveraged Trump’s hotel and casino properties in Atlantic City operated under the name Trump Entertainment Resorts, during the years 1991, 1992, 2004 and 2009. Despite these four bankruptcies, Trump emerged a billionaire, perhaps owing to the fact that he never filed personal bankruptcy. Instead, it was the corporations, limited partnerships and LLCs in which he had ownership interests or the companies that had his name attached that filed for bankruptcy.(source)