"The Mad World of Donald Trump" gives viewers and supporters of the politician a look into his U.S. presidential campaign. The documentary reportedly also gives a glimpse into his early years as a businessman, where English TV presenter Selina Scott talks about the unwanted qualities of the politician.

According to Mail Online, Scott is a major part of the documentary as she talks about her previous relationship with Trump. The TV presenter reportedly got to know Trump in 1995 when she came to New York City to do a profile on him.

The now 64-year-old Scott reportedly revealed in "The Mad World of Donald Trump" some of the undesirable qualities of the U.S. presidential candidate. Mail Online quoted Scott when she described Trump in the documentary as "extremely abusive" and "pathetic."

The TV presenter reportedly first thought of Trump as charming when they first met. However, when his ITV profile eventually aired, the businessman suddenly turned demeaning. His behavior towards Scott changed after the show put his name in a bad light.

"Basically ... he'd lost control and basically because I think that because he realized he couldn't charm me into portraying him the way he wanted to be portrayed. He called me a loser, he said that I was sleazy, that I had come on to him, asking for dates," Scott said in the documentary as quoted by Mail Online.

Trump allegedly had an "all-out war" letter campaign against Scott, which she considered was mental abuse. The politician reportedly eventually stopped with the "harassment" after Scott threatened to fight back.

Scott's revelations about her chaotic past relationship with the politician will be revealed on TV when "The Mad World of Donald Trump" airs at 9 p.m., Tuesday, on Channel 4. Television journalist Matt Frei hosts the documentary as he takes viewers to the colourful life of Trump. According to the video posted on YouTube, the documentary will try to answer people's question about how Trump suddenly became a serious contender to be the next U.S. president.

Scott's appearance in "The Mad World of Donald Trump" came after she revealed in a previous interview that Trump tried to woo Princess Diana. She told The Sun that Trump stalked the late princess with flowers following her divorce from Prince Charles. Diana reportedly even confided on the journalist about Trump's intentions. Scott told The Sun that Trump regretted not dating Diana after her death.