The American people are tired, frustrated, don't trust the govt, feel like we're working to save the world while the homeland crumbles to dust, is under stress from high gas - food prices and is just plain worn the fuck out.
Strike while your enemy is distracted and/or tired.
The US military has once again oriented hard to Europe. The Army, Air Force, Navy and Marines are not properly equipped/motivated to handle a crisis of that magnitude.
Our war stocks are trashed.
I can see why Chinese leadership could be considering moving up the planning.
The only thing that could delay them is Typhoon season. When is that exactly?