The European Union is keen to partner with countries around the world and is "open for business," European Commission chief Ursula von der Leyen said Tuesday.

President Trump doubled down on the prospect of across-the-board tariffs in a video appearance to business executives and politicians gathered in Davos, Switzerland.

Trump's second presidency dominated proceedings at the World Economic Forum amid ominous warnings over the looming threat of trade tariffs and his decision to pull the United States out of the Paris climate agreement.

The Commission informed journalists on Jan. 3 that von der Leyen was suffering from “severe” pneumonia, but did not disclose that she had been hospitalized, even after direct questioning. German newswire DPA broke the news on Jan. 10, which is the same day von der Leyen left hospital, according to Pinho.

Officials and business executives at the annual gathering in Switzerland said the fight against global climate change would continue with or without the United States.

The European Commission wants to dissuade innovative start-up firms from moving to the U.S. to grow by creating rules that would allow them to easily operate across the 27-nation European Union, the head of the Commission said on Tuesday.

Deutsch de EU-Kommissionspräsidentin spricht von historischem Abkommen Original Read more: EU-Kommissionspräsidentin spricht von historischem Abkomme “This agreement between the European Union ...

Ukraine’s President Zelenskyy asked whether the US saw NATO as being necessary as he addressed the World Economic Forum in Davos. Leaders from China, Ukraine and Germany have taken the stage on day one.

Ukrainian President Volodymyr Zelenskyy speaks with CNBC's Andrew Ross Sorkin at the World Economic Forum Annual Meeting in Davos, Switzerland on Jan. 16th, 2024. The World Economic Forum officially began on Monday, but it's Tuesday when the event really kicks off.

Switzerland’s finance minister is concerned that the economic slump in the European Union and Germany will also hit Swiss companies, as both are among the most important trading partners of the country.

EU chief Ursula von der Leyen declared Tuesday that Europe was ready to negotiate with US President Donald Trump