"Not fair to our farmers and manufacturers". "Close co-operation between the United Kingdom and USA is vital to global peace and security", Fox said.
Asked to respond to Trump's accusations that the EU is imposing barriers to USA automakers, Malmstrom said that "it's hard to argue on Twitter over these issues, but the European Union is a very open market".
But Canada has been taking a hard line against Trump in disputes regarding Canadian lumber exports and US dairy exports.
Last week, Trump issued a presidential proclamation imposing a 25 percent tariff on steel imports and a 10 percent tariff on aluminum imports after a Department of Commerce report, called Section 232 National Security Investigation of Imports of Steel and Aluminum, was released, citing the amount of US steel imports as a threat to USA national security and detrimental to the domestic steel and aluminum industry.
The EU urged Mr Trump not to head down "a dead end" road of protectionism and warned of a damaging trade war over his new steel and aluminium tariffs.More news: Omerta about how state-sponsored terrorism manipulates young minds: Hansal Mehta
Sal Guatieri, economist at BMO, said USA consumers will feel the pinch as manufacturers pass on the higher costs of production materials.
"As one example, Americans could pay about one per cent more for an automobile, or just over $300 US".
"The tariffs will extend an upswing in steel and aluminum prices and users' input costs. Sure, they won't stop driving, but they will have less money to spend on other stuff".
Even if US manufacturers increased their output of the two metals, it would add only 0.05 per cent to GDP, according to Guatieri.
The EU has been talking with partners about a legal challenge at the World Trade Organization to Mr Trump's plan and is considering safeguards to prevent steel and aluminium, diverted from the United States, flooding into Europe.More news: 5 things to know about Mizzou's first-round opponent in NCAA Tournament
Earlier Mr Turnbull had ruled out Australia joining an worldwide revolt against the steel tariff or a 10 per cent tariff on aluminium.
The tycoon's threat is part of a dispute over an announcement of tariffs on steel and aluminium imports, although the Trump administration has said it will consider exceptions and has already spared Mexico and Canada.
Article I of the U.S. Constitution says only Congress has the power to set tariffs.
After Trump opened the door, Brazil, Japan, South Korea, Australia and Europe clamoured for special treatment, while Chinese producers called on Beijing to retaliate in kind.
Tokyo and Brussels rejected any suggestion that their exports to the United States threatened the country's national security - Trump's justification for imposing the tariffs despite warnings at home and overseas that they could provoke a global trade war. The president has often threatened to pull out of the trade pact unless the countries reach a deal that better serves USA interests.More news: The Hemenway Trust Co LLC Acquires Shares of 4710 Starbucks Co. (SBUX)