They just gave the Ayatollah a shit load of cash for hostages, and yet Tehran just Charlie-Brown'd them on blocking nuclear inspections.I don't think Biden et al. are that dumb. If they leave Taiwan hanging in the breeze...the USA's role as a world power comes crashing down. It'll take time, but it'll happen. Between what China will do to squeeze us, and every other power looking at USA like it's a leper colony. We'd be done, and the people in charge that made that decision would go down first.
The Biden's aren't the only one's with CCP ties, and it's a problem with leadership on both sides of the aisle being compromised by Beijing. If it was JUST Biden, it'd be one thing, but too many of the powers-that-be in DC are too compromised by Xi for me to trust they'll honor those treaties, instead of just lay on sanctions and maybe at best rushed arms deliveries.
I could see volunteer units saying 'fuck it' against the wishes of DC, but we aren't going to put a Tomahawk or 10 into the Three Gorges, even if Taipai is a radioactive crater or shelled to the point it looks like Bahkmut.
I trust the locals in Asia and their animosity to the CCP/historical China more than I trust DC's willingness to engage in direct peer-on-peer warfare. DC will sell weapons to our allies and feed them intel, but no overt, official actions that qualify as 'war shots' will be on the table unless the CCP strike the US mainland directly.