Though it would be a interesting fantasy scenario, the likelihood of a war between China and the US is very small. Most people immediately draw a paralell between China nd the former USSR in their relation to us, but the tuth is aside from superficial commanilities (big ass "communist" states) our relation with the PRC is nothing like the relation with the USSR.
For one, America is the biggest foreign investor in China... followed by Taiwan and Germany. Yeah, the top two investors pouring their money into China are the countries everyone thinks is going to go to war with them!
The only realistic way that China will do anything militarily, is if Taiwan forces its hand by moving publicly towards independence. If you have been following Chinese-Taiwanese politics, you'll see that is close to impossible. Taiwan's current president is part of the opposition "liberal" party that has such retarded aspirations. The nationalist party, the original chinese government which was outsted b Mao Zedong however, is much more realistic, and regaining its popularity due to its conservative nature, in both cross strait politics and views on international trade and business. The leaders of the nationalist party have pretty decent relations with the PRC government, having just this year had historic meetings with the chinese Premier Hu Jintao. Blah blah blah. Anyway, politically, things on the taiwanese strait seem to be headed towards further co-operation and trade. Afterall, industry estimates put ~"40-80%" of Chinese exports as coming from Taiwanese owned factories, haha, and China's growth is obviously export based.
http://www.businessweek.com/magazine/content/05_20/b3933011.htm
Anyway, globalization is more complicated than you assume. While China has America by the balls in regards to government debt, we have them by the balls in terms of our FDI (Foreign Direct Investment) and the fact that we buy most of their crap. Trade is a two way street, if they try to fuck us, we can fuck them just as easily. However, a symbiotic relationship can be easily maintained... unless you are a union auto worker or electrical engineer working on designing computer chips, haha.
About supplying a "fantasy scenario" war against China, you'd have the support of Taiwan, Japan, the Philipines, Thailand, South Korea, and if we paid them enough, even Vietnam! Vietnam and China are NOT friends, having had many "hot" disputes over strategic islands, etc where vietnamese soldiers were slaughtered in cold blood. China also lacks an ability to "project" its power. If it can barely project its power to Taiwan, do you REALLY think they could even dream of "invading" America? Maybe tossing a nuke our way in the absolute worse case scenario, but there will not be a "Red Dawn" type scenario with China, so solliez!