Security analysts called Trump's move a rhetorical escalation with Moscow, but not necessarily a military one, given that the United States already has nuclear-powered submarines that are deployed and capable of striking Russia.

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,

We’re going to put sanctions,” the president said, even before a deadline he had given Russia this week to engage in cease-fire negotiations had passed.

Indian officials confirmed Saturday the country is not altering policy and will continue buying oil from Russia, despite threats of a financial "penalty" from U.S. President Donald Trump.