BuzzFeed News repeatedly asked Khan if he can provide any extra details about the travel review, how he had been notified, and which government agency had contacted him. However, Khan said in an email that he had no further comment.
Bob Ramsay, the founder of Ramsay Talks, told the Washington Post on Tuesday that he only knew what Khan had told him.
“I don’t know exactly who conducted the review, but in speaking with Mr. Khan, it was certainly US authorities,” Ramsay told the Post. “That’s all I know.”
Ramsay declined to speak with BuzzFeed News.
Khan first came to public attention at the Democratic National Convention in 2016 where he denounced Trump's proposal to ban Muslim immigrants and talked about his son Humayun, who died in Iraq in 2004 while serving in the army.