According to Gage, Trump is the only presidential candidate or major public figure who has written the Truther group a custom letter after being sent their DVDs and literature. Trump's campaign, Gage said, thanked the members of Architects & Engineers for 9/11 Truth for their “continued support.”

“Thank you for your book and DVDs,” read the email, which Gage forwarded to me. “Our advisors will investigate the claims made by the architects and engineers more thoroughly and draw their own conclusions from there. We appreciate your continued support. Sincerely, The Trump Campaign.”

Gage and his group were starstruck. “Someone actually acknowledged we took the time to send them something and said they would look at it,” Gage said. “That’s historic at this level of politics, a presidential candidate.”

Trump’s campaign did not respond to a request for comment.