The campaign of Republican presidential hopeful Herman Cain took another hit on Monday when a fourth woman emerged to accuse him of sexual harassment in the 1990s. But the allegations of sexual harassment are not the only controversies surrounding Cain. Also on Monday, the Wisconsin-based Center for Media and Democracy filed a complaint asking the Internal Revenue Service to investigate whether one of his top aides has used tens of thousands of dollars from a tax-exempt nonprofit organization to fund Cain’s political activities. Citing leaked financial records, the Center says Cain’s campaign manager, Mark Block, used at least $40,000 from his group, Prosperity USA, to pay for Cain’s private jets, air travel and computers when he was exploring a presidential bid. Block founded Prosperity USA just last year. The leaked records cited in the complaint also suggest extensive financial ties between Block’s Prosperity USA, the Cain campaign, and the right-wing advocacy group founded by billionaire David Koch, Americans for Prosperity. Block stepped down from heading the Wisconsin arm of Americans for Prosperity to run Cain’s campaign. We speak with Lisa Graves, executive director of the Center for Media and Democracy, about its request that the IRS investigate the group’s tax-exempt status, and other ways Block may have been funneling money to political campaigns.