John Keller, a trusted aide to Donald Trump for over two decades, passed away unexpectedly over the weekend after a sudden medical emergency, according to family sources. He was 57.

Known as the “man behind the curtain,” Keller served as Trump’s personal aide, scheduler, and all-around fixer—handling everything from travel logistics to wardrobe choices, often down to the snacks stocked on the private jet. For years, insiders joked that “if you wanted Trump, you had to go through Keller first.” His presence was constant across campaign trails, television shoots, and even inside the White House.

Keller reportedly began feeling unwell late Friday night at his Florida home. He was transported to a local hospital, where his condition rapidly declined. While no official cause of death has been confirmed, the family described the episode as a “sudden health event.” He is survived by his wife, two grown children, and his mother.

Colleagues recall Keller as a calm force in high-stress environments. “John was the guy who never raised his voice and never missed a flight,” said a former campaign staffer. “He handled problems before the rest of us even knew they existed.”

Trump responded to the news with a public statement, calling Keller “irreplaceable” and “a man who embodied loyalty, competence, and friendship.” Sources close to the family say Trump spoke with Keller’s relatives personally on Sunday and offered to pay for funeral expenses.

Funeral arrangements are underway, with a public service scheduled in Palm Beach later this week, followed by a private ceremony in Keller’s hometown in Pennsylvania.