Jack Taylor/Getty Images European Council President Donald Tusk hit back after President Donald Trump called the European Union a "foe" of the United States. Tusk defended the close relationship between the US and EU, calling any other characterization of it "fake news". Trump's comments double down on his criticism of NATO member countries at last week's summit. European Council President Donald Tusk hit back after President Donald Trump called the European Union a "foe" of the United States in an interview that aired Sunday. In a Sunday tweet, Tusk said the US and the EU are "best friends" and borrowed one of Trump's most-used phrases, calling any other description of their relationship "fake news."See the rest of the story at Business InsiderNOW WATCH: North Korean defector: Kim Jong Un 'is a terrorist'See Also:Trump calls the European Union, Russia, and China 'foes' of the USScotland's national newspaper slams Trump as an 'appalling human being' as he visits UKThe same day Trump asked Russia to find Hillary Clinton's missing emails, Russians tried to hack Clinton-affiliated emailsSEE ALSO: Trump and Putin sit down for Helsinki conference after Trump bashed past US Russia policy SEE ALSO: Trump made one of the biggest royal faux pas when visiting the Queen — and people are outraged