The USA is represented by Obama and Clinton, the weakest, most appeasing American politicians in my lifetime. They betray America's allies, humiliate America to Russia and in return:

Nikolai Patrushev, the secretary of the Kremlin’s security council, said the new doctrine offers “different options to allow the use of nuclear weapons, depending on a certain situation and intentions of a would-be enemy. In critical national security situations, one should also not exclude a preventive nuclear strike against the aggressor.”

What’s more, Patrushev said, Russia is revising the rules for the employment of nukes to repel conventionally armed attackers, “not only in large-scale, but also in a regional and even a local war.”