No evidence given. US has not declared a war against Russia.
As already explained by NATO Deputy Secretary General Alexander Vershbow, geography and physics make it impossible for the NATO system to shoot down Russian intercontinental missiles from NATO sites in Romania or Poland. Their capabilities are too limited, their planned numbers too few, and their locations too far south or too close to Russia to do so. Russian officials have also confirmed that the planned NATO shield will not, in fact, undermine Russia's deterrent.
Deputy Prime Minister Dmitry Rogozin, Russia's missile defence envoy, said on January 26, 2015, that "neither the current, nor even the projected" missile defence system "could stop or cast doubt on Russia's strategic missile potential" (bit.ly/1XKby93), .