AFP/Getty Images Porsche and other European-made cars could be hit with higher tariffs unless trade barriers come down, President Trump has threatened.President Trump has threatened Europe again with stiff tariffs on auto imports if they don’t drop unspecified trade barriers, but the risk might not be worth the reward. Relatively few European-made cars are actually sold in the United States, for one thing. And even if Trump were to get his way, Europe wants something in return: Easier access to the highly protected and lucrative market for SUVs and pickup trucks that generate the bulk of profits for American automakers FordF, -0.51% and General Motors GM, +0.32% . In a tweet Friday, Trump said the U.S. will apply a 20% tariff on all imported cars made in the European Union unless trade walls aren’t “broken down and removed” soon. That’s 10 times higher than the current level of duties.via