Aside from being dullards, their intent is probably to provide a contrast with Obama's "reset" policy.Romney and Ryan have been emphasizing that Russia is the greatest threat to the USA. Any reason why they keep pushing Russia as the enemy instead of Iran and China?
Also why is North Korea completely off the political and media radar now?
First, it's not a pressing threat. And, second, there are no feasible solutions. Perhaps everyone's stopped pretending we can solve the problem.