President Trump said he told Ukrainian president Zelensky during their call on Sunday that he might give Russian President Putin a new ultimatum to resume serious peace talks or else the U.S. will provide Ukraine with long-range Tomahawk missiles.

Trump told reporters aboard Air Force One on his way to the Middle East on Sunday that he talked with Zelensky about the weapons Ukraine needs, like Patriots air defense systems and long-range Tomahawk missiles.

"I might have to speak to Russia about Tomahawks. Do they want to have Tomahawks going in their direction? I don't think so. I told that to President Zelensky, because Tomahawks are a new step of aggression. I might talk to [Putin]," Trump said.

"I might say, 'Look, if this war is not gonna get settled I may send them Tomahawks.' Russia doesn't need that. I think it is appropriate to bring that up."