U.S. President Donald Trump told President Volodymyr Zelenskiy on Monday that the United States would help guarantee Ukraine's security in any deal to end Russia's war there, though the extent of any assistance was not immediately clear.

President Donald Trump said he would be calling Russian President Vladimir Putin after hosting the president of Ukraine at the White House. Trump sat down with Ukrainian President Volodymyr Zelensky in the Oval Office on Monday before also meeting with other European leaders hastily gathered in Washington.