The European Union will suspend retaliatory tariffs on €93 billion ($109 billion) of US goods for another six months after US President Donald Trump backed down from his threat to impose levies on some EU countries that opposed his push to annex Greenland.

As the EU calls Trump's threat to tariff allies for rejecting his bid for Greenland a mistake, Denmark's leader laments "being threatened by our closest ally."

Proposed countermeasures on U.S. goods are now "on hold" after President Trump ditches planned levies.

By Philip Blenkinsop BRUSSELS, Jan 21 (Reuters) - U.S. customs authorities will face a real challenge if President Donald Trump goes through with his threat to place tariffs on six EU countries - rather than the whole European Union - given the ease of movement of goods between EU members.

EU chief calls President Donald Trump's Greenland tariff threats "a mistake" as European leaders warn of downward spiral in transatlantic trade relations.

The European Union’s top official has described U_S_ President Donald Trump’s planned new tariffs over Greenland as “a mistake especially between long-standing allies."

EU calls emergency meeting after Trump threatens tariffs on countries opposing his Greenland plans. European leaders rally behind Denmark in solidarity.

Trump advisor Kevin Hassett calls for "cooler heads to prevail" as president threatens Denmark with tariffs over Greenland acquisition deal negotiations.

Trump announced a new 10% tariff on several European nations.