GOP insiders say that casino tycoon and staunch internet gambling opponent Sheldon Adelson (pictured) could donate up to $100 million through various conservative political organizations and “dark money” channels in an effort to win back the Senate for Republicans in the upcoming midterm elections in the US.

The 81-year-old billionaire will reportedly lavish the bulk of the cash on Americans for Prosperity, founded by the billionaire Koch brothers; Crossroads GPS, cofounded by political strategist Karl Rove; the Republican Jewish Coalition; and the US Chamber of Commerce. According to IRS rules, nonprofits are not required to divulge personal information of donors, effectively making Adelson’s contributions untraceable.

These groups have already spent millions on TV ads in battleground states like Colorado, Iowa, Arkansas, and North Carolina in the hopes of putting the Senate back in the hands of the GOP.

Adelson, whose Las Vegas Sands casinos extend from Pennsylvania to Macau, is said to be worth $31 billion and has become infamous for writing mammoth checks to his preferred political candidates. In the 2012 elections, the casino mogul spent nearly $150 million in an effort to put a Republican in the White House. Against the urging of Mitt Romney supporters, Adelson dumped an extra $10 million on Newt Gingrich (pictured), singlehandedly propping him up in the race for President that year.

With so much money up for grabs, political organizations and candidates alike have made it a requirement to meet with the octogenarian and trumpet his pet causes. Last spring, Adelson played host to RJC meetings at the Sands that featured Governors Scott Walker of Wisconsin, Chris Christie of New Jersey, John Kasich of Ohio, and former Florida Governor Jeb Bush. All four are potential 2016 Republican Presidential contenders.

But as one of the driving forces behind online gambling in New Jersey, Christie might have to do a little more sucking up than the others. Adelson is vehemently opposed to internet gaming and has vowed to spend “whatever it takes” to put a stop to the industry in the US.

As part of his campaign, the casino magnate has funded the Coalition to Stop Internet Gambling, which routinely releases over-the-top ads claiming that the industry will exploit and corrupt the nation’s children. With a $15,000 donation, Adelson has enticed Senator Lindsey Graham into introducing a bill that would roll back the Wire Act, making online gambling explicitly illegal.

Sources say that Americans for Prosperity has become one of Adelson’s favorite “dark money” organizations. In 2012, the billionaire cut almost $15 million in checks to the group and continues to solidify ties with the Koch brothers-created institution. AFP is expected to spend nearly $125 million this year on conservative causes.

Adelson spreads his tentacles widely with his funding largess, not only betting on Senate races, but also backing Governors, Congressman, pro-Israel groups, and anti-union drives. This year, he gave a public donation of $2.5 million to the Republican Governors Association and handed over the same amount to a Florida group fighting against the legalization of medical marijuana.

Andy Abboud (pictured), who has appeared at several Congressional hearings as Adelson’s representative and was once called hypocritical, has denied that Adelson will spend $100 million in the upcoming elections. “There is no set budget for this cycle,” he said. More importantly, “any group that meets with us and leaks any information true or untrue gets cut off.”

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