The European Commission president, speaking alongside Donald Tusk, said he wanted “to build bridges, not walls”, seemingly referencing President Trump’s campaign pledge.
On Thursday, the American met with Messrs Juncker and Tusk, to discuss the United State’s relationship with the European Union.
Mr Tusk, the European Council president, later revealed that differences remained between the Trump administration and the EU on Russia, energy and trade.
According to German media reports, President Trump condemned Germany for “very bad” trade policies during the meeting.
Jean-Claude Juncker took aim at Donald Trump's plan to build a wall
Europe are always seeking multilateral solutions – we want to build bridges, not walls
Mr Juncker was quick to defend ally German Chancellor as the G7 group braces itself for trade talks with the US.
Speaking at a G7 press conference, the eurocrat then launched an apparent attack the US President.
He said: “We will always stand up here, as we are doing, for our shared values of freedom, democracy, rule of law and respect for human rights.
“We do believe as Europeans in open societies, and we are always seeking multilateral solutions – we want to build bridges, not walls.”
However, Mr Junker soon called reports in Spiegel Online and Süddeutsche Zeitung exaggerated, saying while President Trump had talks about Germany’s trade surplus as a problem, he had not done so aggressively.
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He said their meeting with Mr Trump was “frankly constructive”, adding: “The US cannot compare their trade situation to the EU.
NATO countries' heads of states gather in Brussels
Thu, May 25, 2017
NATO countries' heads of states and governments gather in Brussels for a one-day meeting
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U.S. President Donald Trump and Britain's Prime Minister Theresa May react during a ceremony at the new NATO headquarters in Brussels
“They have to compare with global performances of EU and I made it clear the European Commission is in charge of dealing with trade issues, not member states.”
The US President left European leaders shocked after he hammered Nato members over their failure to meet funding commitments set by the military alliance.
Mr Trump, on Thursday, insisted it was unfair for the US to shoulder the financial burden as “23 out of the 28” members refuse to spend at least two per cent of their GDP on defence.