John Paulson.Rob Kim / Getty ImagesJohn Paulson will sell his stocks and buy gold if Kamala Harris wins the presidency.The Trump-supporting hedge fund billionaire criticized Harris' tax plans on a Fox Business segment.Paulson said a proposed tax on unrealized gains would "could mass selling of almost everything."Billionaire hedge fund manager and Trump donor John Paulson told Fox Business that he will sell his stocks if Kamala Harris wins the presidency in November."I'd go into cash and I'd go into gold because I think the uncertainty regarding the plans they outlined would create a lot of uncertainty in the markets and likely lower markets," Paulson said on "The Claman Countdown."Paulson was particularly focused on Harris' proposal to levy a 25% tax on unrealized gains for individuals worth more than $100 million.