Special U.S. envoy Steve Witkoff said Sunday that Russian leader Vladimir Putin agreed at his summit with President Donald Trump to allow the U.S. and European allies to offer Ukraine a security guarantee resembling NATO's collective defense mandate as part of an eventual deal to end the 3 1/2-year war.

President Donald Trump supports Russian leader Vladimir Putin's proposal for Moscow to take full control of the Donbas and freeze the front lines elsewhere for a deal with Ukraine.

President Trump offered security guarantees to deter future Russian aggression. But the offer was vague, prompting Kyiv to seek clarity.

President Donald Trump and Russian President Vladimir Putin head to Alaska on Friday for a high-stakes summit as the U.S. seeks a ceasefire in the Russia-Ukraine war.One key party who will not be in attendance Friday at Joint Base Elmendorf-Richardson in Anchorage,