"It is with heavy heart I share that my wonderful brother, Robert, peacefully passed away tonight. He was not just my brother, he was my best friend. He will be greatly missed, but we will meet again. His memory will live on in my heart forever. Robert, I love you. Rest in peace," the President said.
The same month, Robert Trump was reportedly hospitalized for several days in the intensive care unit.
Robert and Donald both prominent entrepreneurs had distinctly different personalities. Once Donald Trump described his younger brother as "much quieter and easygoing than I am," and "the only guy in my life whom I ever call `honey.'"
"I think it must be hard to have me for a brother but he's never said anything about it and we're very close," Donald Trump wrote in his 1987 bestseller "The Art of the Deal."
"Robert gets along with almost everyone," he added, "which is great for me since I sometimes have to be the bad guy."
"When the slot machines jammed the opening weekend at the Taj Mahal, he very specifically and furiously denounced Robert, and Robert walked out and never worked for his brother again," Blair said.
A Boston University graduate, Robert Trump later managed the Brooklyn portion of father Fred Trump's real estate empire, which was eventually sold.
Once a regular boldface name in Manhattan's social pages, Robert Trump
had kept a lower profile in recent years. "He was not a newsmaker,"
Before divorcing his first wife, Blaine Trump, more than a decade ago, Robert Trump had been active on Manhattan's Upper East Side charity circuit.
He avoided the limelight during his elder brother's presidency, having retired to the Hudson Valley. But he described himself as a big supporter of the White House run in a 2016 interview with the New York Post.
"I support Donald one thousand per cent," Robert Trump said.
In early March of 2020, he married his longtime girlfriend, Ann Marie Pallan.
The eldest Trump sibling and Mary's father, Fred Trump Jr., struggled with alcoholism and died in 1981 at the age of 43. The president's surviving siblings include Elizabeth Trump Grau and Maryanne Trump Barry, a retired federal appeals judge.
Authors Michael Kranish and Marc Fisher described Robert Trump as soft spoken but cerebral in "Trump Revealed: The Definitive Biography of the 45th President": "He lacked Donald's charismatic showmanship, and he was happy to leave the bravado to his brother, but he could show flashes of Trump temper."