Dmitri Medvedev mocked Donald Trump after he stated that he had deployed two nuclear submarines off the coast of Russia: "It's hard to find a black cat in a dark room, especially if it's not there."

The Russian politician Dmitry Medvedev made an allusion to the deployment of American nuclear submarines, suggesting that it is a bluff. Donald Trump responded, stating that he ordered the positioning of two nuclear submarines in response to Medvedev's provocative comments, calling him a "failure" and accusing him of living in illusions. The two engaged in a debate on social media, escalating tensions between the US and Russia. In the following week, Donald Trump labeled Russia as a "paper tiger."