Take the current crisis in the Korean peninsula for example. At least part of the reason that N. Korea bombarded Yeongyong Island was to protest the military exercise that American planned with S. Korea. After the exchange of artillery shells and dozens of deaths, America went ahead with the exercise anyways and made an extremely tense situation even more dangerous by deploying aircraft carriers in a show of force.
Now America is holding another exercise with Japan and reinforcing the military relationship with S. Korea and Japan. South Korea is holding its own military exercise at the same time and recent news have reported that live fire exercises are taking place right now in the North as well in response. Both Korea's have their militaries on the highest alert right now, NE. Asia is in a highly tense and volatile state where any stray bullets can spark a major war.
America's goals right now are crystal clear. America's policy towards N. Korea in recent times has been the same, which is intimidation. Time and time again this has proven to not work and it only serves to escalate the situation and push the N. Koreans to develop more advanced ballistic missile technology and build additional nuclear weapons. Even worse N. Korea will respond to whatever the US decides to do with nuclear/missile deals with Iran under the table. A nuclear N. Korea is not intimidated by anyone, not the US or China at this point because any war will end in mutually assured destroyed of N. Korea and S. Korea. The US can surround the Korean Peninsula with all its Carrier Battle groups and N. Korea will not be afraid.
However, the recent exercise with S. Korea is also part of America's containment policy on China. By deploying carriers into the Yellow Sea, the US navy is literally knocking at China's doors and showing China that US still dominates the Pacific and China cannot compete even in its front yard.
So will this aggressive foreign policy continue into the future when China overtakes the US as the leading economic power of the world? Will US policy play nice or will the Conservatives try everything in its power to undermine China and do everything in its power to sabotage China's development. Will we see an economical world war or a physical confrontation between China and the US in the near future?