The EU's top diplomat and Poland's prime minister said Wednesday that the bloc must heed US President Donald Trump's demand to spend much more on defence -- faced with the "existential threat" posed by Russia.

The EU's top diplomat Kaja Kallas said Russia is a problem "for all of us," while adding that Trump is "right" on European defense spending. Poland's Donald Tusk said "if Europe is to survive, it needs to be armed.

U.S. President Donald Trump has promised to address a longstanding trade deficit with the European Union, saying he will reverse that by imposing tariffs or making the EU buy more U.S. oil and gas. In an "America First Trade Policy" memo issued on his first day back in the White House on Monday,

President Donald Trump widened his tariff threats to include China and the European Union on his second day back in office after day one saw Canada and Mexico in his sights.