I dunno about absolutely certain war but the cold war has definitely been restarted. 
If you ever wonder how it came to this, just remember Obama's juvenile response to Romney during their debate. When Romney expressed concerns about increasing Russian aggression, Obama said to Romney "the 70s just called and they want their foreign policy back''. Got a big har dee har out of the true believers, as I recall.
Obama seemed to think our only worry was radical terrorism, (not radical islamist terrorism; he would never say that.) He didn't even have the perspective of how Russia factors into that with it's support of Iran and Syria.
Incredible and dangerous naivety.