Dmitry Medvedev has traveled a long way from his time as Russian president, when he once stood beside then-US President Barack Obama and declared that “the solution of many world problems depends on the joint will of the United States and Russia.

President Donald Trump has reportedly hinted that his nuclear submarines are now "in the region of Russia" after he ordered them there following a comment made by former Russian President Dmitry Medvedev.

Former Russian president Dmitry Medvedev has become embroiled in a tense back-and-forth on social media that prompted U.S. President Donald Trump to announce he had ordered the re-positioning of two U.