NATO  European member states for the United States is expected to take action against steel imports, launched an unusual lobbying, arguing that this will damage the US allies, rather than China's target.

Over the past two weeks, German and Dutch military officials have brought their concerns to the US Department of Defense and its minister, James Mattis. Washington officials say Matisse has already conveyed their concerns.

The United States is expected to take repressive measures on the grounds of national security. US domestic steel producers believe that dumping in China and other countries undermines their ability to supply the US military.

Production of steel, may be the impact of the NATO partner countries eager to refute the national security statement, and warned that this may exacerbate the tension between the transatlantic alliance. The United States may impose punitive tariffs or adopt quotas on steel imports.

This lobbying strategy is extremely unusual because US defense officials are usually not involved in trade disputes.

The G20 summit next month will be held in Hamburg, where Germany is particularly concerned about the impact of US measures taken on steel imports. European officials warned that the US crackdown on steel imports would fuel Europe's anti-American sentiment, making the United States put forward new sanctions against Russia, the United States from the Paris climate agreement and Donald Trump (DonaldTrump) on NATO's skepticism Of the existing friction to further increase.

Trump said he will honor his campaign to protect the steel industry from unfair international competition that he sees as unfair.

US Secretary of Commerce Wilbur Ross is expected to announce results for a special investigation of the impact of steel imports on US national security in the coming days.

The steel survey also sparked another fierce trade debate within the Trump government.

Trade hawks are pushing Trump to impose a comprehensive tariff on imports, while the White House National Economic Council Chairman Gary Cohen (GaryCohn) and other pro-business advocate restraint. In the ally position, Matisse also joined the camp that advocated restraint.

"It is really worrying that imports from Europe (considered by the United States) threaten national security," a European official said. "The current mood is revenge."