By Timothy Gardner, David Lawder and Seher Dareen WASHINGTON/LONDON (Reuters) -From punishing Brazil to trying to curb imports of fentanyl, U.S. President Donald Trump has wielded the threat of tariffs as an all-purpose foreign policy weapon.

In a desperate bid to arrest the rapid erosion of US imperialism’s global economic and geopolitical power, Trump is threatening, bullying and attacking Washington’s ostensible allies, no less than those it has long identified as its strategic adversaries.