Mother Jones illustration; Niall Carson/PA Wire/Zuma; Courtesy of Fred Trump

grandson of Donald Trump Fred Trump III doesn’t expect to be invited to his uncle’s inauguration this time. After all, he wrote a book exposing some of the unsavory behavior of the president-elect, including Donald. telling Fred that he should leaves his disabled son William to die.

But Fred Trump still plans to spend time in Washington, DC in the coming years to make progress on disability issues. “I joke that there are two things Donald and I share: a love of golf and we’re both relentless,” Fred said. That relentless drive to and to start a nonprofit advocacy organization to fight for improved care for people with intellectual and developmental disabilities alongside his wife, Lisa.

In an interview with Mother JonesFred said his uncle’s increasing use of both the phrase “mentally disabled” and the R-word to describe his opponent Kamala Harris in the weeks leading up to the election reflected his harmful views on disability.

Noting Harris’ intelligence in response, Fred said it wasn’t yet a criticism of Trump: “It doesn’t matter. Don’t tell anyone.”

And Fred isn’t just mad at Donald: it’s the reaction of his uncle’s supporters. They laughed again and again when Trump turned disability into a cruel joke, Fred noted, just as they laughed when Trump flouting New York Times reporter Serge Kovaleski’s disability in 2015.

Fred thinks the Harris-Walz campaign could have pushed much harder on disability issues; he witnessed the campaign drop the ball when it came to engaging with disability organizations, he said, and as the father of a young disabled son, Fred was discouraged that Minnesota Gov. Tim Walz didn’t addressed the issue during his debate with Vice President-elect JD Vance.

“Tim Walz doesn’t even mention the word disability,” Fred said. “You have a child who has a disability who became a guiding light during the convention, and I was there to witness that.”

But unlike some people who oppose Donald Trump’s presidency, Fred thinks questioning the election is a waste of time. Instead, he urged, people who oppose the new administration should “get quickly engaged in whatever cause is important to you.”