Mexico is preparing its response and so is the EU.
European leaders aren't hiding their anger either.
French President Emmanuel Macron had tried to good-cop Trump, developing a bro-ship with the unpredictable American leader and trying to influence him in favor of international agreements. That didn't work on the Iran deal.
And when the two spoke about trade and immigration recently, the bromance seemed to be over.
Theresa May, the British Prime Minister, planned to express her displeasure at the "unjustified and deeply disappointing" tariffs, according to Downing Street.
The effort has not not swayed Trump, according to the White House.
"The President feels very confident in his decision," White House press secretary Sarah Sanders said during a short briefing with reporters, "and will continue to make sure that the unfair trade practices that have gone on for decades do not continue and that he's protecting the interests of American workers and American businesses."
The tariffs, however, have put Trump at odds with normal US allies like Canada and Mexico -- and also complicate separate but related negotiations on NAFTA.
International allies are being unusually direct with Trump and so are Republicans. Leaders in the House and Senate have criticized Trump's move, although it is not at all clear there's support in Congress for any sort of revolt.
None of this should be a surprise at this point in the Trump presidency. On foreign affairs, he's been pulling out of international deals and upsetting the decades of US foreign policy from his first days in office, when he withdrew the US from a massive trade deal with Pacific nations (they've moved on without the US), and held combative conversations with leaders from Mexico and Australia.
The combination of Trump's decision to scuttle the Iran nuclear deal, his dogged pursuit of a face-to-face meeting with North Korea's leader Kim Jong Un, his separate high-stakes game of tariff escalation (or maybe a trade deal) with China and the confusing US relationship with Russia, makes finding a specific message out of Trump's foreign policy a fraught exercise.