The leaders of all 27 European Union nations will meet for an “extraordinary meeting” later this week, European Council President Antonio Costa said on Sunday, in response to U.S. President Donald Trump’s escalating pressure campaign to acquire Greenland.

European leaders are mobilizing after Trump on Saturday announced a 10% tariff to be imposed on all goods sent to the U.S. from eight NATO nations — Denmark, Norway, Sweden, France, Germany, the U.K., the Netherlands and Finland — that recently sent small contingents of troops to Greenland to take part in military exercises there.

On Sunday, Trump sent a letter to Norwegian Prime Minister Jonas Gahr Store in which the president again expressed his desire to take control of Greenland. Store’s office confirmed to ABC News on Monday that Oslo received the message from Trump. The details of the letter were first reported by PBS.

“Considering your Country decided not to give me the Nobel Peace Prize for having stopped 8 Wars PLUS, I no longer feel an obligation to think purely of Peace, although it will always be predominant, but can now think about what is good and proper for the United States of America,” Trump wrote.

Source-ABC