Former Russian defectors call it the Scissors Strategy. This is where the Russians and the Chinese forget about their difference and attack the American mainland.
America is ripe for such an attack. The last three Presidents sent the majority of our combat troops out of the country where they will do us not good should we ever be attacked.
Convential wisdom says bring the troops hone shoud we ever be attacked. However, convention wisdom (Bush, Clinton and Obama) did not want to see the tearing down of the Republic and that is what we are saying.
Here is a more detailed analysis of this situation.