Republican presidential frontrunner Donald Trump has reached an unfathomable point in a person's life where success is in every corner but the question remains: what is his secret?

John Oliver may have revealed the answer to that during Sunday's episode of HBO's "Last Week Tonight with John Oliver."

In the 22-minute long video posted over YouTube, the Emmy Award-winning writer basically trashed the same reputation that Trump is waving in his presidential competitors' faces.

According to Oliver, those who supported Trump who won the primaries in three huge states in the United States should rethink who they're voting for, pointing out that he may not who they think he is.

One of the reasons why Americans like him is because "he tells it like it is."

This, says the host, is a grave and utter misconception, pointing out statistics posted by the website PolitiFact stating that "77 of his statements, and rated 76 percent of them as varying degrees of false."

Another thing Oliver straightened out in the clip is the idea that Trump is independent because of his reiteration that he funds his own campaign and is not beholden to anyone.

Aside from that, the host also pointed out how Trump is wildly inconsistent with his statements, saying: "He's been pro-choice and pro-life, for and against assault weapon bans, in favor of both bringing in Syrian refugees and deporting them out of the country."

But aside from discrediting the characteristics his supporters see as his advantage, Oliver also revealed that Trump had not been very honest with how he presented himself to be.

Talking about the businessman's success, Oliver made the big reveal: Donald Trump used a surname that was not his to begin with, just to build his "brand."

Apparently, one of Trump's ancestors changed their last name to "Trump" from "Drumpf."

A report from the September 2015 Boston Globe revealed that the Donald Trump that America looks up to today hailed from a German wine-growing family.

Citing Gwenda Blair's "The Trumps: Three Generations That Built An Empire," the outlet explained that the Drumpfs officially became the Trumps during the Thirty Years' War.

From there, Fred C. Trump, Donald's father, started using their new last name in every business he put up, including their supermarket chains and real estate company.

After that, the Republican frontrunner started throwing his last name in every business venture that he claims to be of high "quality."

While the name changing is not illegal, Oliver's main point in the video was to open the American people's eyes at who he really is and not be "blinded by the magic of his name."

Calling Trump a "litigious serial liar with a string of broken business ventures," he called for the Republican presidential candidate to become "Donald Drumpf again."

Check out the entire video of Sunday's episode "Last Week Tonight with John Oliver: Donald Trump."