Interior Secretary Ryan Zinke Ryan Keith ZinkeTrump extends Florida offshore drilling pause, expands it to Georgia, South Carolina Conspicuous by their absence from the Republican Convention Trump flails as audience dwindles and ratings plummet MORE in 2013 had on his radio show a former Navy SEAL who had described himself in the past as a "birther."

CNN reported that in 2013, Zinke interviewed former Navy SEAL and political activist Larry Bailey on his Montana radio show, "Commander Z."

Bailey co-founded the anti-Obama group Special Operations Speaks. In 2012, he said that former President Obama was not born in the United States and called himself a part of the birther movement, according to CNN.

ADVERTISEMENT

Zinke also raised questions about Obama's college records on the radio show.

"And the college records, you know, why not release them? I'm interested. Did he [Obama] say he was a foreigner and did he get a scholarship? Did he apply and receive a grant? That's what I hear. I don't know," Zinke said in July 2013 when speaking with Bailey on his radio show.

In a statement responding to the report, Interior Department spokeswoman Heather Swift said that Zinke had many guests on his radio program who "expressed a variety of views and opinions."

"Mr. Zinke would always challenge his guests to defend their opinions regardless of the topic and no matter how controversial," Swift said in the statement.

A number of people in the past have questioned Obama's birthplace, including President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE.

A report last year said Trump still privately questions the authenticity of Obama's birth certificate. Trump was a leading member of the birther movement against Obama, claiming for years that the former president was born outside the U.S.

According to CNN, Zinke on his radio show in April 2013 also talked about a conspiracy theory regarding the Boston Marathon bombing. He addressed the theory that a third person, a Saudi national, played a role in the attack.

"I don't blame every Saudi," Zinke said at the time.

"I have a lot of friends, as you do, that, that are Saudi, but certainly we can't let our guard down. I don't think that these two individuals were operating alone. I think it smacks of a cell. And we've talked about a cell. We looked at it, we've hunted cells before. This has every trace, every, you know, evidence leading towards a cell. I'm hoping the Saudis aren't involved. Uh, but, but the facts are as they are."