If Sarah wins the 2012 election and Obama doesn't give up the prez and then the US has a civil war and China?

You can't take over anything with airpower alone, you need ground forces to you know, actually occupy the ground. It's also unlikely China would side with the Democrats, as Republicans are the ones who typically run big businesses, and China has a vested interested in keeping the U.S. as a trade partner. China would also have a tough time getting to Hawaii. Since none of their planes have the range to get to Hawaii and back to China again, even with air fueling. They would also have to contend with the Pacific Fleet and it's six carrier groups. A MacArthur-esque island hopping campaign wouldn't be feasible since the carriers would blow any ships trying to move men an materials trying to build airbases out of the water. Also keep in mind the Carrier groups are superbly equipped to deal with any submarine threat with anti-sub aircraft as well as Seawolf and Virginia cl attack submarine escorts of their own.