Ask Congressional Research Service to Conduct a Study of US War Termination Behavior. The focus of this testimony is on the political and strategic factors influencing Chinese decision-making. While avoiding conflict is an important objective, ensuring that any war that does break out is as short and limited in violence as possible (and the US wins) is equally important. The US has a historical tendency toward mission creep and maximalist demands that undercut these goals. If a war breaks out over Taiwan, the United States needs to be prepared to return to the status quo antebellum, even if militarily victorious. If the US demands Taiwan independence after a military victory, we will be stuck fighting China for decades or Beijing will escalate to levels of violence we are unwilling to match or absorb.
These people are idiots. If two nuclear weapon states fought like that the result wouldn't be anyone's victory. What do they think this is, Iraq or Libya? Cities would be glassed. And not just in China.
No, the US would just acquiesce and at most make economic sanctions. Just look at what happened with Georgia and Crimea.