The director of "An Inconvenient Truth" was filming with Barack Obama on Friday in Montana, but the campaign was cagey when asked about details.

The Illinois senator first was seen with director David Guggenheim Friday afternoon when the two emerged from a museum in Butte, Mont., after spending more than an hour inside.

Reporters initially were told by the campaign that Obama was inside doing a taping for the Democratic National Convention. They later were told he was taping for the campaign's new media division. That division shoots footage for the Obama Web site.

But a makeup artist on the press bus later spilled that the crew was inside the museum doing a documentary -- for the convention.

Asked about the claim, Obama's traveling press secretary Jen Psaki said that was incorrect. "It is a new media taping and [I] don't have anything else to add," she said in an e-mail to FOX News.

The confusion continued.

Reporters again spotted Guggenheim emerging from Obama's bus after the ride back to Obama's hotel, also in Butte, Mont., and asked him personally about the taping.

The filmmaker admitted he interviewed Obama, but then told reporters he wanted to clear it with the campaign before talking further about the interview on the record.

Guggenheim is appearing on the campaign trail with Obama after Al Gore, who starred in the award-winning documentary on global warming, endorsed Obama last month.

Guggenheim finally rode with the press to a hotel around the corner, and Psaki sent another e-mail to reporters clarifying, to an extent: "was a new media taping for the DNC. I am sorry we were not more specific. We don’t have additional details to share at this time."

Click here to watch Guggenheim talk to reporters about his interview with Obama.

FOX News' Bonney Kapp contributed to this report.