The campaign posted a web video defending Trump University after a federal judge unsealed documents in a long-running lawsuit filed by ex-students who claim they were fleeced.
The seminars ended in 2011 amid a flurry of complaints and state fraud investigations.
"The students on this video are representative of the many students who were overwhelmingly satisfied with Trump University," the campaign said yesterday. "Rather than listen to the media spin, listen to the hard-working students who can attest first-hand to the truth about Trump University."
Not disclosed by the campaign is that Hoban is also a Trump family acquaintance whose protein-infused water is stocked at Trump's golf courses, restaurants and resorts.
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Hoban told The Associated Press that his business relationship with the Trump organization bloomed after he attended a charity event held last year held by a Trump family foundation. Trump's son Eric Trump later tweeted Hoban a personal thank you for his USD 25,000 donation.
Hoban told the AP that he had only met the Trumps a couple of times and that his budding business relationship with the Trump empire had nothing to do with his offer to the campaign to issue a public endorsement of Trump University.
"Absolutely not, from the bottom of my heart," Hoban said.
"I offered to support Trump University because I did some amazing investments after going to that class. I thought it was a way to tell the world that after going to that class at Trump University I prospered."
"I see and hear there are former Trump University students coming out, and I have to sit back and think to myself if they were given the same education, the same opportunity, how come they didn't have the same results?" Gunn says in the video. "I think that is because you have to take action upon yourself. You have to go out and make it happen."
Not mentioned by the campaign is that the celebrity billionaire previously endorsed a self-help book authored by Gunn's teenage son, titled "Schooled for Success: How I Plan to Graduate from High School a Millionaire.