Washington (CNN) - When the super PAC backing Mitt Romney, Restore Our Future, files its June donation report on Friday with the Federal Election Commission, it is expected to show a six-figure contribution from Wyoming businessman Foster Friess, his first to the group.
But an unwelcome scrutiny came to Friess, Nevada billionaire Sheldon Adelson and some of the other wealthy donors to these super PACs, and some are planning for much of their future generosity to be behind a cloak of anonymity.
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Friess said he has decided his financial donations in the future will mostly be to groups that do not have to disclose their donors. He said he is planning on contributing to five or six so-called 501(c)(4) groups named after the section of the tax code they are organized under. These are nonprofit organizations that can advocate on behalf of social welfare causes or to further the community. He refused to discuss which groups, but did say one recipient could be an affiliate of American Crossroads, the group founded by Karl Rove.
Another major donor who has felt the wrath because of his political contributions this year is Adelson, who is considering making at least some of his future contributions to groups that aren't required to reveal the names of their contributors, sources have told CNN.
Adelson, along with his wife, gave $20 million to the super PAC backing Newt Gingrich, Winning Our Future, and those donations caused controversy. The couple last month made its first donation to Restore Our Future.
Their $10 million contribution will be reported on the Friday report, sources previously told CNN. Adelson is now considering requests by several major GOP activists, such as David and Charles Koch and leaders of Crossroads GPS, to commit as much as $10 million to them, sources have said. The groups operated by the Koch brothers and Crossroads, an arm of American Crossroads, aren't legally required to disclose donors' names.
Friess, owner of an investment management firm, was a major reason Rick Santorum could stay alive during the primary season and was one of the largest contributors to the super PAC that supported the former Pennsylvania senator, the Red, White and Blue Fund, by giving it $2.1 million.
The 72-year-old multimillionaire is a long-time backer of various conservative and religious causes and is now fully backing Romney, saying the presumptive Republican nominee is the best hope for helping fix the country's economy.
Friess said he felt burned by the publicity his work for Santorum generated.
"I was kind of shocked to see the notoriety, the high profile I got. I didn't know if I needed that," he told CNN in a phone interview. "People looked at me as a villain."
He said wealthy donors like him were portrayed in the media as having too much influence. He sees his role as giving back.
"This American free enterprise (system) … has been very good" to him, he said. "I want to do everything to sustain it for future generations."
He refused to divulge the exact amount of his June donation to Restore Our Future and added he was not planning on any future contributions to it, but didn't rule them out.
Friess said he has made fund-raising calls on Romney's behalf and will do more of them, although he declined to provide a number.
He also said he and his wife have donated as much as they can to the Romney Victory Fund, the joint Romney-Republican National Committee fund-raising initiative.
"We have maxed out to everyone," he said.
He was on the host committee for the recent fund-raiser Romney attended in Wyoming. Friess could not attend because of a prior out-of-town commitment, but his wife and family did.
Not only does he want to do all he can to help Romney get elected, but he said he also will make sure his work helps Republicans in close Senate races, particularly those in Ohio and Nevada, because control of Congress could be up for grabs. He donated money to support Wisconsin Gov. Scott Walker during his recall election.
"I am committed to making sure we have a country which honors the investments and sacrifices prior generations have made to liberty," he said.