By Sam Youngman
DENVER, Aug 14 (Reuters) - Republican vice presidential candidate Paul Ryan will meet behind closed doors with donors and fundraisers in Las Vegas at the Venetian hotel, owned by casino mogul and formidable campaign donor Sheldon Adelson.
The Wisconsin congressman will meet with members of the Nevada finance team on Tuesday evening - his first such event as part of Mitt Romney's campaign - but members of the media will not be allowed to attend.
Romney himself held a meeting with Adelson, this campaign season's most prominent donor, at the same hotel in May, but it was not certain that Ryan will meet the billionaire.
Adelson has yet to contribute directly to the Romney campaign, according to the latest disclosure filings, but the magnate and his wife, Miriam, have donated $10 million to the outside "Super PAC" group backing Romney.
During the primary season, Adelson and his family spent $21.5 million to support another Republican candidate, Newt Gingrich, who dropped out of the race on May 2.
The gambling magnate's business empire is under review by several regulatory bodies that are looking into his casino powerhouse Las Vegas Sands Corp and its operations in Macau, the only place in China where casinos are legal.
Sources familiar with the probe this week told Reuters the Nevada Gaming Control Board is investigating whether the company broke bribery laws through its dealings in mainland China.
That probe is on top of reviews by the U.S. Department of Justice and the Securities and Exchange Commission, which the company confirmed in March filings.
Las Vegas Sands has denied illegal activity.
The Romney campaign has allowed reporters to cover fundraisers as long as they are in public venues and not at private residences, but an aide said Tuesday's event in Las Vegas was different because it was not a fundraiser but a "finance event."
Ed Conard of Mitt Romney's private equity firm Bain Capital is one of 12 donors who've given at least $1 million to the super PAC Restore Our Future, which supports Romney's bid for the White House. Due to the obliteration of campaign finance law by the Supreme Court, donors can give unlimited amounts to the super PAC. Meet Romney's dozen.
Blake Roney, Nu Skin (Personal Care Products). Gave $1 million as part of a shell corporation.
Steven Lund, Nu Skin. Gave $1 million as part of a shell corporation.
Robert Mercer, left, Renaissance Technologies (Financial)
John Paulson, Paulson & Co. (Financial)
Julian Robertson, Tiger Management (Hedge Fund)
Paul Singer, right, of Elliot Management (Hedge Fund)
Melaleuca and owner Frank VanderSloot (Personal Care)
Paul & Sandra Edgerley
Paul & Sandra Edgerley, Bain Capital
Bob Perry, Perry Homes (Home Builder)
Francis Rooney, Rooney Holdings (Financial)
Oxbow Corp. and William Koch
Oxbow Corp. and owner William Koch (Energy & Technology)