On the eve of what is expected to be a tense, in-person meeting between the leaders at the G7 summit in Quebec, President Trump publicly took aim at Canadian Prime Minister Justin Trudeau and French President Emmanuel Macron for imposing "massive" economic burdens on the United States.
After an early morning Twitter posting that said he was, "Getting ready to go to the G-7 in Canada to fight for our country on Trade (we have the worst trade deals ever made)" he piled on later in the evening with more.
It remains unclear whether May will hold talks with Trump in Canada.
"There are disagreements", top White House economics advisor Larry Kudlow acknowledged.
Corker, whose state of Tennessee is home to foreign and domestic auto plants, questioned Trump's national security justification in a statement last week.
"Mr. President, we now know from your performance last Wednesday at that White House "Celebration of America" event that you actually don't know the lyrics of that song".
"A trade war doesn't spare anyone", Macron said. But the charge is not true. At the same time we will not stop trying to convince our American friends, and President Trump, that undermining this order makes no sense at all, because it would only play into the hands of those who seek a new post-West order, where liberal democracy and fundamental freedoms would cease to exist.More news: Group of 10 senators challenge Trump over tariffs | State and Nation
A Canadian flag flutters in front of the Detroit skyline, as seen from Windsor, Onatario, Canada.
The president appeared to be in no hurry to leave for Canada earlier Friday.
Apart from this nascent trade war, Trump has also pulled the US out of the Iran nuclear deal, threatening foreign companies that still want to do business there.
In April, Canada tried to address what Trump said were concerns about Chinese steel and aluminum being dumped into Canada and then being shipped into the United States. But economists disagree about his claims of a trade deficit with Canada, and many say it's misguided.
Friday morning he was spitting again: "Canada charges the USA a 270% tariff on Dairy Products!"
This year's G7 summit, which begins Friday in Canada, is set to be unusually ill-tempered, with the US facing off against the other six in the group: Germany, France, Italy, Canada, Japan and the United Kingdom.
German Chancellor Angela Merkelsaid they were "illegal", while Trudeau said they were "insulting and totally unacceptable". "I had no idea". If there was absolutely no concern for human rights, global treaties, national sovereignty and simply using military force to beat up on a less powerful neighbor-and Trump has absolutely no concern for any of those things-there might be an economic argument for adding Russian Federation back into the mix. But it's nonetheless one that critics have taken issue with, making it relevant here. "Within the worldwide framework, we have to take measures and that's what Canada has done and what the European Union has also announced".