Kevin O'Leary called for the imposition of heavy tariffs on China during an interview with Fox News on Sunday.Christopher Willard/ABC via Getty Images; Tingshu Wang-Pool via Getty ImagesKevin O'Leary says the US needs to impose heavier tariffs on China."You squeeze them because the Chinese only understand the stick," O'Leary told Fox News on Sunday.Former President Donald Trump says he'll impose tariffs of more than 60% on China if he's elected."Shark Tank" star Kevin O'Leary says the US needs to level the playing field against China by imposing heavy tariffs on the country.O'Leary was on Fox News' "Sunday Night in America with Trey Gowdy" when he called for increased trade restrictions with China."I want to go to DEFCON 19 against China.