Original sentence: Peter David Schiff (; born March 23, 1963) is an American author, businessman, financial commentator, video blogger, adherent of the Austrian School of economics, economist holding an undergraduate degree in accounting and finance, and a 2010 candidate for the United States Senate
Edited sentence: Peter David Schiff (; born March 23, 1963) is an American author, businessman, financial commentator, video blogger, adherent of the once-mainstream Austrian School of economics, economist holding an undergraduate degree in accounting and finance, and a 2010 candidate for the United States Senate