Newly minted GOP frontrunner Herman Cain acknowledged his long relationship with the conservative billionaire industrialist brothers Charles and David Koch yesterday. Cain has “close” and “long ties” to the Koch Brothers, as the AP reported this week, likely making him the conservative political duo’s “favorite presidential candidate,” as ThinkProgress has noted. Yesterday, Cain told CNN he is “very proud of the relationship that I have with the Koch Brothers:”

CAIN: I know the Koch Brothers. The Koch Brothers helped to start to an organization called Americans for Prosperity. And I did some speaking when they were starting that organization, and I’m very proud of the relationship that I have with the Koch Brothers, as well as Americans for Prosperity. I have also attended some of their seminars and have found them very informative. So I don’t have a close relationship with the Koch Brothers, but I know them and I respect them, and they know me and respect me.

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Cain’s campaign manager is the former president of the Koch-funded Americans for Prosperity’s (AFP) Wisconsin chapter, his former spokesperson worked for the group’s Louisiana chapter, and his economic adviser was on their advisory board. Cain himself used to hold an official position with AFP as well. He also attended the brothers’ influential private biannual meeting, and has spoken at several events they sponsored.

Last night, ThinkProgress’ Scott Keyes appeared on MSNBC’s Politics Nation to discuss Cain’s ties with the Kochs. Watch it:

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ThinkProgress filed this report from the Values Voters Summit in Washington, DC.

Last week, Bloomberg released a bombshell report on Koch Industries, the oil conglomerate owned by the secretive conservative billionaires David and Charles Koch. The report revealed that Koch Industries subsidiaries were doing business in Iran and using bribes to win contracts elsewhere. The Koch Brothers were apparently alarmed enough about the report’s release that a blogger with extensive ties to the Kochs attempted to pre-but the allegations well before Bloomberg’s release.

Given these damning allegations – Koch Industries admitted the bribes were criminal and the United States has banned trade with Iran since 1995 – ThinkProgress asked the congressman whose district includes Koch Industries, Rep. Mike Pompeo (R-KS), whether he planned to open an investigation into the matter. Pompeo blew off the notion, walking away from reporters rather than answer the question. Despite being asked three times if he planned to open an investigation into Koch Industries’ dealings with Iran, Pompeo was silent, allowing his communications director to block ThinkProgress instead.

KEYES: Are you going to be leading an investigation into Koch Industries’ dealings with Iran?

POMPEO: [Silence.]

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It’s not particularly surprising that Pompeo would resist opening an investigation into Koch Industries. His extensive ties to the Koch Brothers have earned him the title, “the congressman from Koch.” When Pompeo was confronted about undue influence that the Kochs have on his office, he responded, “Koch Industries is an amazing business.”

ABC News attempted to ask David Koch this week about the oil tycoon’s business deals in Iran and bribes used by Koch Industries. Like Pompeo, Koch was silent on the matter.

Former pizza executive Herman Cain’s rise to the top of the Republican presidential pack will undoubtedly put smiles on the faces of two brothers: Charles and David Koch.

The Koch Brothers are infamous for using their billions to finance the Tea Party and helping to gut business and environmental regulations. They have not been shy about influencing conservative politics, both through large direct contributions – the Kochs have pledged to raise $88 million for the 2012 election – and funding corporate front groups like Americans for Prosperity.

Though the Kochs have not made a public endorsement in the Republican presidential contest, Herman Cain’s rise from niche radio host to presidential frontrunner appears to have been largely fueled by the Koch network. From Cain’s early foray into politics to his presidential campaign speeches to his top staff, the former pizza executive has had close, consistent ties with the Koch Brothers.

Given the extensive connections between Herman Cain and the Koch Brothers, ThinkProgress asked the former pizza executive about his thoughts on David Koch back in March. Cain called David Koch — as well as his brother Charles — a “patriot”:

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Here is a rundown of the numerous ways in which Cain and the Kochs have worked hand-in-hand for years to advance corporate-friendly conservative policies:

- Cain held an official position in the Koch-funded group Americans for Prosperity: Dating back to 2005, Cain led Americans for Prosperity’s new “Prosperity Expansion Project.” The position allowed Cain to barnstorm the country, giving speeches, holding town halls, and sharpening his skills for an eventual presidential bid.

- Cain’s campaign manager is the former president of Koch-funded Americans for Prosperity Wisconsin chapter: Prior to becoming Cain’s campaign manager and chief of staff, Mark Block served as the president of Americans for Prosperity’s Wisconsin chapter. At the same time Block was serving in that position, he is credited with “talk[ing] Herman Cain into running for president”. As AFP-Wisconsin president in 2006, Block even tried to convince Cain to run for president in the 2008 election because of the former pizza executive’s rousing speeches at Americans for Prosperity events. Block has a history of electoral dirty tricks and once fined $15,000 for violating Wisconsin election law.

- Cain attended the Koch Brothers’ private biannual meeting in Palm Springs: In January, the Kochs hosted one of their biannual meetings of top corporate and political figures in order to coordinate strategy and raise money for the conservative movement. Cain was among the small group of conservative politicians invited to attend.

- Cain traveled to Wisconsin in support of the Koch-funded union-busting bill: During the apex of the fight in Wisconsin over Gov. Scott Walker’s (R) union-busting bill this spring, Cain traveled to the Badger State to support the conservative power-grab, speaking at a rally in February. The Koch brothers were major players in Wisconsin’s anti-union push.

- Cain headlined a Koch-funded anti-climate rally in New York: As other presidential candidates focused on glad-handing with voters in Iowa and New Hampshire, Cain took time out in June to travel to New York and headline a Koch-backed anti-climate rally. The rally, held by Americans for Prosperity, protested New York’s involvement in the Regional Greenhouse Gas Initiative, an important project to fight global warming that has been long-opposed by the Koch Brothers.

- Cain was a featured speaker at the Koch-funded RightOnline conference: Cain has been a featured speaker at RightOnline, the Koch-backed conservative conference, for the past two years.

The Koch Brothers’ investment in Herman Cain appears to already be paying dividends in advancing their corporatist agenda. Cain has centered his presidential bid around the “999″ economic plan, an enormous corporate giveaway that would reduce companies’ income tax rate from 35 percent to 9 percent. Not only would Koch Industries reap massive benefits, but the Koch Brothers themselves — already tied for the fourth richest people in America — would personally see their tax rates fall from approximately 28 percent to around 11 percent.

This morning, blogger Brad Friedman, writing in Mother Jones and BradBlog, revealed a set of audio tapes from the last major donor meeting convened by the billionaire Koch brothers. There are a number of startling revelations from the scoop — but the opening remarks from Kevin Gentry, a Koch Industries executive at the firm’s DC lobbying office, blow the cover off the many Tea Party efforts underwritten by the billionaires in the Koch network of donors.

Gentry, who doubles as the official responsible for doling out Koch charitable grants, admits privately what ThinkProgress and others have noted for years: Americans for Prosperity, the front group founded by David Koch, orchestrates Tea Party events simply to elect more Republicans. Gentry said he met with Fred Young, a Wisconsin owner of engine manufacturing plants, at an Americans for Prosperity (AFP) event “designed to help in the Congressional races” during one of their “get out the vote tours”:

KEVIN GENTRY: I’m going to turn it over to a dear friend, Fred Young, for the purposes of an introduction. Fred is a long-time fighter, freedom fighter, in this movement, from Racine, Wisconsin. Former owner of Young Radiator. As part of our efforts last year, in 2010, I was on the road for [TN?] in Wisconsin, here at one of Americans for Prosperity’s last minute kind of get out the vote tours. And I went to an event in Racine, Wisconsin, and met up with Fred. It was sort of a Tea Party AFP event designed to help in the Congressional races. And Fred was kind enough to lend me a sweatshirt because I wasn’t actually prepared for Racine, Wisconsin in November. So Fred, let’s take it away, please.

Too many in the media ignored the Koch network’s transparently partisan agenda last year. A few outlets, like the Washington Post, took the group to task for spending $45 million in attack ads against Democrats using an unaccountable, secret money wing of Americans for Prosperity. However, most failed to report on the millions more spent on four different bus tours designed to promote Republicans. These rallies, which required great resources in terms of staff and logistics, were never reported to the Federal Elections Committee as campaign spending, thus evading the few watchdog groups and reporters interested in serious election coverage.

As ThinkProgress revealed last year, in documents outlining the June, 2010 donor meeting, billionaires like Paul Singer, Ken Griffin, Rich DeVos, and John Childs are regular attendees of these events, which solicit multi-million donations for an elaborate array of right-wing front groups, from Tea Party organizers like Americans for Prosperity to stealth advertising campaigns like “Public Notice.” Unfortunately, many still report on Tea Party groups like Americans for Prosperity as bonafide grassroots organizations.