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.

President Donald Trump has ordered the repositioning of two U.S. nuclear submarines. Friday's decision comes after what he calls "highly provocative statements" by former Russian President Dmitry Medvedev.

Did former Russian President Dmitry Medvedev warn President Donald Trump that he should not think that "the Mossad alone has a video archive of his past depravities"? No, that's not true: The quote was attributed to "Russia media" by