Washington( CNN) Just as the White House is caught in a political minefield over the Russia investigation, the Pentagon is taking its toughest line yet against Russia's resurgent nuclear forces.

“Russia considers the United States and the North Atlantic Treaty Organization( NATO) to be the principal threats to its contemporary geopolitical aspirations, ” the report says.

“The Defense Intelligence Agency currently calculates Russia has a stockpile of 2,000 “non-strategic” nuclear weapons including short-range ballistic missile, gravity bombs and depth charges that can go on medium scope bomber aircraft, ” according to the report.