I think our ambassador and his comments very fairly and accurately reflect the policy of the United States.
We've seen the reports of comments attributed to other party officials.
This is not something new. We've heard these sorts of comments before. It was not phrased or given as an ultimatum but rather to the contrary.
We're issuing this in the wake of some comments by President Chen in Taiwan that we don't want to be inflammatory or send the wrong signal, so we thought it useful to reiterate US policy on the subject.