Almost a year and a half ago, President Donald Trump famously tweeted that 'trade wars are good and easy to win.' But shortly after he announced another ten-percent increase in tariffs on 300-billion-dollars’ worth of Chinese goods, global stock markets dropped and economists warned of a looming recession. Trump’s top trade official and a Democratic presidential hopeful shared their views Sunday on ABC’s 'This Week.' Arash Arabasadi has more.