In case Sarah Palin is not aware, Russia is the second largest nuclear power in the world. The idea of an all out war with Russia has been discussed to death over the past fifty years. It's commonly referred to as MAD. Ms Palin might want to look it up on wikipedia.
For a more visual understanding of what warring with Russia might look like I highly recommend that Ms Palin (or anyone insane enough to consider voting for her) watches this movie:
WARNING: The above is a very graphic and disturbing portrayal of a nuclear holocaust. Definitely R rated stuff. Guaranteed to shock you and beat you over the head with its message. But if you can stomach the whole thing it will forever change the way you view a hypothetical war with Russia.