Trump may tank the economy even further unless he backs off tariff threat: expert

The market-wide selloff on Tuesday should be a sign to President Donald Trump that he needs to back off his tariff threats, according to one expert.

The stock market sank on Tuesday after Trump announced new 10% tariffs on goods from certain E.U. countries until the U.S. annexes Greenland. Those tariffs are scheduled to increase to 25% if the issue remains unresolved by the summer.

The DOW Jones Industrial Average lost more than 870 points on Tuesday. The tech-heavy NASDAQ 100 declined by 561 points...