Top diplomat responds to Trump's comment that EU formed to 'screw' US

Kallas made the comment while speaking to CBS News' "Face the Nation," arguing the EU is fundamentally about maintaining peace.

"Europe is a peace project. You know, it was created so that we wouldn't have wars between the members of the European Union, and we haven't had any. And, of course, also to do things together, cooperate more," Kallas said.

"You know, coming from a country that joined the European Union 20 years ago. Then, we were actually, you know, pushed by the Americans, you know, [saying] you will not get into NATO, but Europe, the European Union, is something that you should join because it's, it's a good project also for transatlantic relations. So I was quite surprised to hear a comment like that," she added.

"The fight that Ukraine is having is not only about Ukraine sovereignty, but it's much, much broader. It's about freedom of the free world, really. It is about the world where international law applies and the world where might does not make right," she said.

The official went on to argue that the U.S. and Europe could grind the Russian war machine to a halt via economic pressure.

"We shouldn't overestimate the power of Russia and underestimate our own power," she argued. "We know that their economy is not doing well. I mean, their inflation is over 20%, their National Fund is almost completely depleted."

"They don't have the same revenues from gas and oil that they used to to fund the war machine. So actually, if we concentrate our efforts, we can put the pressure so that they would stop the war," she continued.