New York — Russian leader Vladimir Putin agreed at his summit with President Donald Trump that the United States and its European allies could offer Ukraine a security guarantee resembling NATO’s collective defense mandate as part of an eventual deal to end the war, a U.S. official said Sunday.

President Trump and Russian President Vladimir Putin are scheduled to meet Friday at Joint Base Elmendorf-Richardson in Anchorage, Alaska, to discuss the conflict between Russia and Ukraine.

Secretary of State Marco Rubio said "both sides are going to have to make concessions" to end Russia's war in Ukraine.

Putin summit in Alaska, the causes of the Ukraine-Russia war and what Congress can do to impose consequences on Russia on 'The Five.'

"What has been building up for the Ukrainians is fundamentally a manpower issue," a former senior Pentagon adviser told Newsweek.