President Donald Trump issued a rare threat of nuclear escalation on Friday, saying he had ordered two nuclear submarines to be strategically positioned near Russia in response to what he said were aggressive remarks by Dmitry Medvedev,

P resident Donald Trump said on Friday he's ordered two nuclear submarines to move in the "appropriate regions" in response to what he called "highly provocative statements" from the deputy chair of Russia's security council, Dmitry Medvedev.

US President Donald Trump says he has ordered two nuclear submarines to "be positioned in the appropriate regions" in response to "highly provocative" comments by former Russian President Dmitry Medvedev.