Peter Navarro, one of President Trump’s trade and economics advisors, insists on blaming meat packers for persistently high prices and manipulating the beef supply: . @POTUS is taking on the Big Beef cartel. 🥩Four packers: Cargill, JBS, Tyson, and National Beef—control 80%+ of America’s beef supply. JBS and National Beef are effectively run from Brazil, where exports to China help set U.S. beef prices.