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 Trump has offered only vague assurances of security guarantees for Ukraine if President Volodymyr Zelensky agrees to cut a deal with Russia.

President Donald Trump said on social media Saturday that a deal better than “a mere Ceasefire” is in the works with Vladimir Putin, hours after Trump’s high-stakes summit with the Russian leader in Alaska failed to produce an agreement to halt Russia’s invasion of Ukraine.

President Trump has abandoned a push for a cease-fire, arguing instead for a full peace agreement, a position held by Russian President Vladimir Putin.

Steve Witkoff says Vladimir Putin agreed at his summit with Donald Trump to allow the U.S. and European allies to offer Ukraine a security guarantee resembling NATO’s collective defense mandate.

President Trump is set to meet with Ukrainian President Volodymyr Zelenskyy and European leaders at the White House on Monday as the U.S. pursues a long-lasting peace agreement to end Russia's war in Ukraine.