By bizn_fun 
If, however, we do take Trump’s latest threats seriously, they are extremely troubling.
Not so much because of the 10% tariff, but because of its rationale – taking land from an ally, and the act of publicly trying to coerce your allies. How would the world react if China or Russia had sent a threat like this to some of their allies?
The basis of the threat is clearly deeply worrying.
Many in capitals around the world will read Trump’s social media announcement and question the functioning of American decision making.
President Trump arrives to meet leaders of the allied countries whose economies he has just threatened at the World Economic Forum on Wednesday.
Most of the world will hope that, by that time, this unparalleled threat will have somehow disappeared.