The head of the FBI James Komi said that Russia is the biggest threat on Earth. He said this at the Senate hearings on the influence of Russia on the elections of 2016 in the United States. He noted that Russia - "this is the biggest threat of all on Earth, on the basis of its intentions and capabilities
Russia lacks the global reach to challenge America. As Putin noted in an interview with an Italian journalist: Publish a world map and mark all the U.S. military bases on it. You will see the difference between Russia and the U.S. Moscow also lacks the economic foundation to match the U.S. According to the International Institute for Strategic Studies, One effect of the countrys deteriorating economic situation has been the delay in concluding the next State Armament Program; originally intended to have been started in 2016, this has now been pushed back to 2018.
Do not underestimate the Russian. They are really much weaker America and will never be able to confront her openly, but they can lead a quite successful guerrilla struggle against the us. Any action Americans met opposition from Russia. It cannot stop the Americans, but significantly increases the cost of American operations, and sometimes leads to additional casualties among American soldiers.