Mr Trump and Mr Kudlow are travelling to Quebec later this week for a meeting of leaders from seven of the world's leading economies, and several of those officials have expressed frustration at Mr Trump for his protectionist approach to trade.
US President Donald Trump erroneously blamed Canada for the burning of the White House in the War of 1812 during a recent telephonic talk with Canadian Prime Minister Justin Trudeau, according to a media report.
"A trade war doesn't spare anyone", Macron said.
Ministers from Germany, France and Britain have already written to US officials urging them to shield European companies working in Iran from getting caught up in Washington's new sanctions on Tehran.
"We want a trilateral agreement - we've always said this", said International Trade Minister Francois-Philippe Champagne.
Trump has since mused about replacing NAFTA with bilateral trade deals with Canada and Mexico - an idea Trudeau shot down on Wednesday.
G7 leaders have praised the USA president for his efforts to stabilise the Korean peninsula, but are unhappy that he pulled out of the Iran nuclear deal. The EU trade surplus with the U.S.is $151 Billion, and Canada keeps our farmers and others out. "Look forward to seeing them tomorrow".
Trump's comments come ahead of a G7 summit where the growing trade battle between the U.S. and some of its closest allies will take center stage of crunch talks.
"Take down your tariffs & barriers or we will more than match you!"
But Mr Trump showed no sign of backing down on Thursday, first taking to Twitter to accuse both France and Canada of imposing massive tariffs on USA goods and then accusing Trudeau of "being so indignant".
Even before these developments, it had become clear that this would be one of the more contentious G-7 meetings in memory. The member countries are Canada, France, Italy, Japan, Germany, the United States and Britain.
Although the pair insisted there was no bad blood between them when Ms Merkel visited Washington in late April, the workmanlike nature of the one-day visit was in stark contrast to the fuss that Mr Trump had made earlier in the week for France's leader.
Under Trump, the United States has abandoned its traditional role in the G-7. The Chamber of Commerce estimates that Trump's trade policies threaten as many as 2.6 million American jobs.
Already at the meeting of the finance ministers ahead of the G-7, the six non-U.S. countries released a statement raising concerns about US trade actions.
Trump will leave the gathering at 10:30 a.m. on Saturday and put Everett Eissenstat, his deputy assistant for global economic affairs, in charge for the remaining sessions, White House spokeswoman Sarah Sanders said in a statement on Thursday. Let them meet; let them discuss.
Canada also announced retaliatory tariffs on $12.8 billion (£9.5 billion) worth of United States goods, including steel and aluminum products, mayonnaise, and sleeping bags.
The remarks are likely to create more cross-border economic uncertainty with the US after Trump imposed stinging steel and aluminum tariffs on imports from Canada, Mexico and Europe. Trump is reportedly also becoming increasingly annoyed with the UK's prime minister as the president feels that May's demands on him are taking advantage of the UK-US special relationship - a partnership that was forged in the Churchill days and has lasted through till modern times. Washington has threatened tariffs on imports of Chinese goods unless Beijing stops stealing American companies' intellectual property.
Maas also highlighted the need for European nations to seek other allies as their relationship with Washington deteriorates, particularly with natios that "wish to hold to the multilateral world order".