Trump threatens to "strike back" if EU imposes tariffs over Boeing

U.S. President Donald Trump on Thursday threatened to "strike back" against the European Union if it put tariffs on U.S. goods after it won the right to do so earlier this week in retaliation against subsidies for planemaker Boeing.

"If they strike back, then we'll strike back harder than they'll strike. They don't want to do it," Trump told reporters at the White House.