Mark Penn [3], the CEO of the PR firm Burson-Marsteller [4], was tight-lipped when asked about his role as "chief strategist" for Hillary Clinton [5]'s campaign [6] to be the Democratic Party nominee for president. "Both by custom and by contract, it is confidential," he said. Penn has co-authored a new book, "Microtrends: The Small Forces Behind Tomorrow's Big Changes [7]." New York Times reporter Deborah Solomon asked Penn whether he'd "be more credible" if he disclosed who his corporate clients were. "I've worked for hundreds of clients. It's a false notion that my views are related to that. I'm not selling anything in this book," he responded. However, in May 2007, Bloomberg News reported that [8] Penn wrote in a blog post that one of the benefits of "mixing of corporate and political work" was that it was "helpful in cross-pollinating new ideas and skills." "And," he added, "I have found it good for business."