European leaders visit Kyiv as questions swirl over future of US backing for Ukraine under President Donald Trump.

"The free world needs a new leader," said European Union's foreign policy chief after President Trump and Ukrainian President Volodymyr Zelenskyy sparred in the Oval Office.

European leaders called on the Ukrainian leader to "be strong, be brave, be fearless." The European Union's top diplomat, Kaja Kallas, said it's "clear that the free world needs a new leader" after the unusually explosive meeting.

Ukrainian President Volodymyr Zelenskyy arrived in London ahead of a summit with other European leaders organized by British Prime Minister Keir Starmer.

Chief EU diplomat Kaja Kallas argued the EU is a "peace project," not an organization meant to "screw" the United States.

The EU is expected to announce “concrete” measures on boosting defense financing this week, sources said, as Europe and the U.S. clash over support for Ukraine.

President Donald Trump made a comment about Ukraine President Volodymyr Zelenskyy's choice of clothing as Zelenskyy arrived at the White House.

Ukrainian President Volodymyr Zelenskyy received an invitation from European Council President António Costa to attend the special European Union summit set for March 6.

World leaders pledge support for Ukraine and emphasize Russia is the "aggressor" following the Oval Office spat in which the Trump administration accused President Volodymyr Zelenskyy of being "disrespectful.

The European Union is getting good at adapting to unprecedented circumstances. Over the last five years, the 27 member countries have pulled together to fund the purchase of tens of millions of vaccines and devised a massive recovery fund to resuscitate economies ravaged by the pandemic.

Friedrich Merz, who is likely to be the next German chancellor, has been outspoken in his belief Europe needs to pursue greater independence from the US.