This is such a stupid move... If U.S are so strong right now is because they are respected by most country and have build very strong ally across the world, Trump and people who support that kind a behaviour don't realize you only lose by doing something so childish. Other leader will see this and view the POTUS as unpredictable and not ready to discuss tough subject. I would not be surprise to see many country slowly lowering their business with U.S.A and starting to seek other big power as ally, like china or EU.
In Canada many people are talking about getting even closer to China because the view U.S politics as to unstable and unpredictable.I know Canada is a small country with not a lot of power, but it's very respected in international organization and hold huge reserve of naturals resources and water. something U.S doesn't want to go to china, India or E.U.
Trump is acting tough but he will soon realize it's going to be rough to be tough if no one backing you...