 They argue that a mere one percent of the American public (3 million people) can create a "microtrend" capable of launching a major business or even a new cultural movement, changing commercial, political and social landscapes.From December 2008 to December 2009, Penn authored a regular online column for the "Wall Street Journal" called "Microtrends".Throughout 2018 and 2019, Penn was vocal with his criticisms of Special Counsel Robert Mueller's probe into Russian interference in the 2016 election.