Donald Trump disregarded one and everyone in the allies for taking advantage over the United States. He openly criticized Canada for improper trade agreements and threatened its immediate neighbor Mexico with erecting a wall across its border. He asked Japan and South Korea to have its own nuclear weapons to protect itself from North Korean threat. He had withdrawn the United States from Paris Climate Change agreement, the decision was outrageous and criticized by allies, and at the same time, he affiliated his statement by saying that he doesn’t believe in climate change.
He scraped NAFTA meant for North America free trade agreement among USA, Canada and Mexico, citing the unfair and improper agreement, and he pushed them for renegotiation which the people of Canada and Mexico believed an act of humiliation, although they agreed to renegotiate fearing his rhetoric. Iran nuclear deal was another setback and awkwardness for the allies in Europe, the deal was negotiated to deal with Iran Nuclear Aspiration between Iran and UN security council members & Germany, the US previous administration called it a historic and great breakthrough, but Donald Trump unilaterally threatened Iran to withdraw the United States from the deal and imposed sanction over Iran for Nuclear program. The US key allies in Europe, United Kingdom, France and Germany conveyed their displeasure to the president and requested him to rethink, but nothing worked out.
The biggest clash took place in UN general assembly in Dec 2017, US closest key allies were voted in support of resolution which condemned the US decision to move its capital to Jerusalem, as a result, its ambassador in UN openly said the member nations which voted against them will be punished including allies and announced US $ 285 million cut for UN budget.
The regime of Donald Trump has forced its ally to rethink and recalibrate their relationship with the United States. They are also reviewing their policy and relationship with Russia, as a result, many heads of state and the high-level delegation of US allies were visited Moscow in 2017-18. The allies are now increasing their military expenses for self-defense and self-reliance in the absence of United States, Japan is revisiting its policy of military buildup, and European Union has also started modernizing their military so that they can take on their enemy without the United States.
The approach of confrontation with ally would be detrimental for United States foreign policy and its economy in long run. United State is super power because it has strong allies, they must understand it, the president Trump should be more calculative.