At least a dozen Congressional Republicans – along with Silicon Valley's top dogs– attended an off-the-record conference at a swanky Georgia retreat and discussed how they might derail Donald Trump's bid for the presidency.

The Huffington Post tracked down a number of attendees of this year's World Forum, hosted by the right-leaning think tank the American Enterprise Institute and held at the opulent Sea Island resort over the weekend.

Apple CEO Tim Cook, Google co-founder Larry Page, Napster creator Sean Parker and Tesla Motors and SpaceX boss Elon Musk gathered at the confab alongside House Speaker Paul Ryan, Senate Majority Leader Mitch McConnell, longtime GOP strategist Karl Rove and many more.

The No. 1 topic of discussion, the Huffington Post wrote, was how to stop Trump in his tracks.

Stop Trump: Attendees at the American Enterprise Institute's World Forum - which included top Congressional Republicans, Silicon Valley titans and media moguls - discussed how to derail the billionaire's White House bid

Attendees of the secretive conference included Apple CEO Tim Cook (left), GOP strategist Karl Rove (center) and Tesla and SpaceX head honcho Elon Musk

The American Enterprise Institute's World Forum is held on Sea Island, which is devoted in its entirety to housing a secluded resort

Top Congressional Republicans Senate Majority Leader Mitch McConnell (left) and House Speaker Paul Ryan (right) were reportedly in attendance

The annual conference, which additionally attracted Senate Republicans including Tom Cotton, Cory Gardner, Tim Scott, Rob Portman and Ben Sasse – the latter of which publicly committed to not support Trump – is known for its secrecy.

So much, in fact, that a writer for Bloomberg Politics last year grumbled that the gathering was 'so secretive we couldn't even get a snow update.' At the time, a winter storm had beat up the East coast.

The locale, an island resort, is known for its seclusion.

The Huffington Post used aviation records and congressional sources to map together a listing of attendees as the American Enterprise Institute wouldn't confirm any names of the guests.

'The event is private and off-the-record, therefore we do not comment further on the content or attendees,' said spokeswoman Judy Stecker to the Huffington Post, describing the gathering as 'informal' and for the 'leading thinkers of all ideological backgrounds to discuss challenges that the United States and the free world face in economics, security and social welfare.'

Sea Island's Cloister Hotel is one of the largest landmarks on the secluded island, which hosted some of the country's top politicians and tycoons over the weekend

The Weekly Standard's Bill Kristol did shed some light on the what the conference attendees discussed, saying that there were many conversations about derailing Donald Trump's candidacy

Trump was clearly viewed as a challenge.

The Weekly Standard's Bill Kristol sent an emailed report from the gathering heavily borrowing from the 'Communist Manifesto' to articulate his thoughts.

'A specter was haunting the World Forum – the specter of Donald Trump,' Kristol wrote. 'There was much unhappiness about his emergency, a good deal of talk, some of it insightful and thoughtful, about why he's done so well, and many expressions of hope that he would be defeated.'

'The key task now, to once again paraphrase Karl Marx, is less to understand Trump than to stop him,' Kristol continued.

'In general, there's a little too much hand-wringing, brow-furrowing, and fatalism out there and not quite enough resolving to save the party from nominating or the country electing someone who simply shouldn't be president,' the conservative writer added.

Even with Kristol's advice, other sources told the Huffington Post that Trump-centric conversations often fell back on 'how this happened, rather than how we are going to stop him,' one attendee told the publication.

Rove reportedly did his part by presenting how focus groups had reacted to The Donald.

Key weaknesses included Americans having trouble envisioning Trump as 'presidential.'

Additionally, voters were unsure Trump was somebody their kids could look up to.

The Republican frontrunner was viewed as erratic and someone who shouldn't hold the nuclear codes.

A spokesman for Scott, the South Carolina senator, reached out to Dailymail.com to say that the senator, who is supporting Sen. Marco Rubio in the presidential race, 'neither heard about nor participated in any panels or meetings regarding the 2016 race – period,' Press Secretary Sean Conner said via email.

Alongside Senate Republicans, a smattering of House Republicans attended the conference too including House Majority Leader Kevin McCarthy and Reps. Fred Upton, R-Mich., Kevin Brady, R-Texas, Cathy McMorris Rodgers, R-Wash., Tom Price, R-Georgia, Jeb Hensarling, R-Texas and Diane Black, R-Tenn.

Kristol's boss, billionaire Philip Anshutz, a GOP donor who owns the Weekly Standard and the Washington Examiner, attended too, along with Arthur Sulzberger, the publisher of the New York Times.