"We are seeing accommodation more than we've seen in the past, certainly more than we saw in the last administration," Witkoff said. "And that's encouraging. Now we have to build on that."

The protections that the US and Europe would be able to provide to Ukraine are similar to NATO's collective defense mandate.

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.