Herschel Walker solicited "hundreds of thousands of dollars" from a billionaire benefactor "for his own personal company—a company that he never disclosed on his financial statements." Via the Daily Beast:

Correspondent Roger Sollenberger revealed that "emails obtained by The Daily Beast—and verified as authentic by a person with knowledge of the exchanges—show that Walker asked Washington to wire $535,200 directly to that undisclosed company, HR Talent, LLC. And the emails reveal that not only did Washington complete Walker's wire requests, he was under the impression that these were, in fact, political contributions."

Sollenberger noted that "in the best possible circumstances, legal experts told The Daily Beast, the emails suggest exponential violations of federal fundraising rules; in the worst case, they could be an indication of more serious crimes, such as wire fraud."

[...] "According to the legal experts who spoke to The Daily Beast for this article, this scheme appears to not just be illegal—it appears to be unparalleled in its audacity and scope," Sollenberger wrote. "The transactions raise questions about a slew of possible violations. In fact, these experts all said, the scheme was so brazen that it appears to defy explanation, ranking it among the most egregious campaign finance violations in modern history."