U.S. President Donald Trump could offer NATO-like protection of Ukraine, and Russia is open to the idea, one of his top foreign policy officials said on Sunday ahead of a meeting with Ukraine and European leaders to hammer out details of possible security guarantees for Kyiv.

European and NATO leaders will join Zelensky in Washington for talks with President Trump on ending Russia's war in Ukraine. Russia agrees to allow NATO-like security protections for Ukraine, U.S. envoy says.

Sources tell NBC News President Trump discussed U.S. and NATO-like security guarantees for Ukraine as part of a possible permanent peace deal with Russia on his way back from his summit with Russian President Putin.