The White House press briefing is embarrassing to watch. It consists of three main points, first is that because they've violated Chinese soverignty before, they should be allowed to keep doing it, second that no one has any idea if Pelosi is actually going to go to Taiwan, and finally if she does go it's 100% unofficial and that Xi is supposed to know this.
It sounds like the death rattle of a dying empire to me. I still strongly doubt that Pelosi will enter Taiwanese airspace, I bet that plane has no one on it.
I've changed my mind on this. If the USAF enters Taiwanese airspace it should be intercepted and escorted to Hainan with all passengers detained for violating Chinese airspace (regardless of whether Pelosi is on board or not). If fighter jets escort they should be authorised to have a dogfight...it doesn't really matter who wins. It'll go down as a skirmish that can be deescalated as neither US or China wants a full scale war with each other.
ROC should be told to stand down. If they scramble anything, fire a missile in defence or try anything to obstruct the defence of Chinese airspace in any way that should be the green light for an invasion.