In a bid to rebuild America's industry, Trump has imposed tariffs on steel and aluminum imports, including those from key G7 allies like Canada, Japan and the European Union. "Because these six represent values, represent an economic market, and more than anything, represent a real force at the international level today." Canadian Prime Minister Justin Trudeau predicted "robust discussions" on trade, but other G7 members like Japan and Italy seemed less likely to want to challenge the US president. Trump fired back soon after on Twitter, addressing both leaders directly, saying they were charging "massive tariffs" on US goods and had erected other trade barriers. Macron, who appeared to have built a warm relationship, said the "G6" leaders would not spark a fight at the summit.