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.

EU, German and Chinese leaders took turns defending global cooperation in Davos on Tuesday as the spectre of new trade wars looms following Donald Trump's return to the White House.Trump will make an online appearance at the World Economic Forum in Switzerland this week,

US President Donald Trump reiterated a call for the European Union to buy more American oil and gas if the bloc wants to avoid tariffs.

The return of U.S. President Donald Trump to the White House is a wake-up call for European Union countries to fix their economies and become more competitive, the EU's senior financial officials said on Monday as Trump was sworn in for a second term.