Congress now has several options: it could pass a law taking back from Trump powers regarding commercial matters, which have been doled out to the White House progressively since the 1930s for purposes of efficiency.
"The idea that jurisdictions where they're now making steel and aluminium, the idea that if they can't ship it to America they'll just sit at home and do nothing, that is negligent attitude", he said.
President Trump apparently commented on how violent the scenes he was seeing were, while the rest of the room was silent, one attendee told Kotaku (the meeting itself was closed to press). "He's not quite as strong on those tariffs".
Trump, in a move last week that surprised many of his top advisers, called for stiff tariffs on the import of steel and aluminum. Specific steel and aluminum products could also be excluded and that authority will rest with Commerce Secretary Wilbur Ross. Retaliatory tariffs placed on USA products could impact 11 states where exports account for more than 10 percent of gross domestic product.
The former real estate developer said US politicians had for years lamented the decline in the steel and aluminum industries but no one before him was willing to take action.
"I think there's a good chance that we will nullify the tariffs", he told reporters.
US President Donald Trump, left, and German Chancellor Angela Merkel at a panel discussion at the G20 summit in Hamburg, Germany. "It's certainly going to be chaotic". However, we recognize that an agreement negotiated over 25 years ago needs updating to give American companies and workers new opportunities for growth and prosperity and to reflect commerce and the economy of the 21st Century.
Philip Levy, a former trade adviser in President George W. Bush's administration, said the flaw in Trump basing his tariffs on national security was that military allies could ask to be excluded, undermining the president's stated goal of protecting domestic steel and aluminum mill jobs.
Canada and Mexico were specifically exempted from that order for the time being.
Trump's order specifically excluded Canada and Mexico, the United States' two largest trading partners, because the administration is now in the process of trying to renegotiate the North American Free Trade Agreement, or NAFTA.
The proclamation also notes how closely linked the United States, Canada and Mexico are, both economically and in terms of being physically next to each other.
Japan said the import duties would have a "big impact" on bilateral ties, while South Korea threatened to take the issue to the World Trade Organization.