"As it is well-established, the U.S. does not support independence for Taiwan," State Department spokesman Sean McCormack said.
"DPP needs to carefully consider the meaning of these words."
Mr. McCormack is dead wrong. He is reading his own Chi-com appeasing sentiments into official U.S. policy.
That policy is not that "the U.S. does not support independence for Taiwan", we are officially agnostic on the subject; neither officially seeking it or officially opposing it.
The core of our position is that the issue MUST be resolved peacefully.
And, if China takes mere words as a provocation for military action the United States will defend Taiwan, as we have given our word to Taiwan on the matter of "must be resolved peacefully".
The largest percentage of the people of Taiwan (1)see themselves now, and historically as Taiwanese, not Chinese (yes there is a difference, get a history lesson from someone other than a KMT or mainland "Chinese); and (2)are not opposed to independence but want the status quo for now (they're business people, they want business to continue).
The "ideal situation" of "reunification of Taiwan and the mainland" is never going to happen peacefully unless and until the dictatorship in China is gone.
The "actions of Chen and the DPP" do not "destroy chances" for anything. They may, depending on what actually happens vs the words of the moment, create a crisis, but it is not a given fact that any particular options at that time have been "destroyed".
No matter what Taiwan does or does not do, if she is attacked by China, the U.S. will defend her (oh, and the U.S. will not be alone in that defense either).
China's prosperity is intrinsically tied to the U.S. at this point; and for the forseeable future. No matter how it feels about Taiwan, that future and its prosperity will end on the day it attacks Taiwan. Matter of fact, in spite of all its own hubris and bluster, I believe the current leaders in the dictatorship understand this.
I really think you are making the same mistake as Chen. If Chen or any other DPP president announces formal independence, and if China invades, the US will not go to war against China. We may protest at the UN, we may send some Chinese diplomats home, but not one American soldier, sailor, or pilot will die for TI.