European Union foreign policy chief Kaja Kallas pushed back on Wednesday against Donald Trump for saying that Europe lagged behind the U.S. in aid for Ukraine, and insisted the bloc must have a seat at the table when the time comes for peace talks.

President Donald Trump fields questions from economic leaders at the World Economic Forum in Davos, Switzerland, marking his first major international appearance since returning to the White House earlier this week.

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.

President also plans to ask for "financial contribution" for maintenance of remaining troops, European diplomatic source said.

U.S. President Donald Trump’s threats of a trade war persist, but EU leaders are responding calmly for now. European Commission President Ursula von der

Europe will respond to any tariffs imposed by President Donald Trump in a proportionate way, the European Union’s commissioner for the economy told CNBC Wednesday.

New figures from Europe show fossil fuels are being pushed out of the EU’s electricity system, even as Trump orders a halt to renewable energy projects.

President Donald Trump has given everyone at Davos something to talk about with his actions on the first day of his second term.

Mr Trump has also withdrawn the US from the Global Tax Deal - an agreement on a global minimum corporation tax.

The bloc's defence push could potentially be used as leverage in a trade standoff with Trump, according to Stephane Sejourne, the EU's commissioner for industrial strategy, who noted Europe's economy needs to be in good health to allow for more security spending.