Weeks after appearing at a VIP dinner for the Koch brothers-backed political group Americans for Prosperity (AFP), George Will devoted his Washington Post column to promoting one of the Kochs' favored political candidates without disclosing the conflict of interest.

Last month, Politico reported on Will's attendance at a private dinner featuring an “exclusive group of major donors and VIPs” as part of AFP's Defending the American Dream summit. Despite repeated attempts by Media Matters, neither Will nor AFP would answer whether he had been paid for the appearance or compensated for his travel expenses. Will has repeatedly devoted column space in the past to promoting Koch-backed candidates and policy issues.

When the journalism group Society of Professional Journalists released its new Code of Ethics in September, the group's ethics chair cited Will's relationship with AFP -- and his refusal to disclose whether he had been paid by the group -- as the type of conflict journalists should try to avoid.

Apparently undeterred, in his September 26 column, Will sang the praises of Republican Iowa Senate candidate Joni Ernst -- a candidate who has received massive financial support from the Kochs and their political groups -- without disclosing his conflict of interest.

In his column, Will lamented that the contest between Ernst and Democratic challenger Bruce Braley “should not be this close.” He dismissed Democrats' “War on Women” narrative and asserted that Braley “is as awkward as Ernst is ebullient when campaigning.”

Pointing to spending by outside groups on Braley's behalf, Will classified the Iowa Democrat's “fretting about money in politics” as being “notably selective,” and wrote that although “politics is an inherently transactional business,” Braley is “operatically indignant about the Koch brothers.”