He also said that the long-term war is necessary because Russia and China are breaking "global rules," which he did not define.

On Wednesday NATO's Secretary-General Mark Rutte said that the bloc's member-states must increase military production ahead of a prolonged standoff with Russia, China, Iran and North Korea, because those countries are challenging the "global rules." Rutte said that even after the Ukraine war ends, Russia will remain a threat.

"The danger posed by Russia will not end when this war does," he said. "For the foreseeable future, Russia will remain a destabilizing force in Europe and the world."

The world-war-like proclamation was made to Western defense contractors at the NATO-Industry Forum in Bucharest, Romania. He promised that "there is more cash on the table and even more will flow."