Having a US based company with fabrication facilities on US soil is vital to national security and will be for the entirety of my lifetime and likely my grandchildren's lifetime (if I ever have any). For all the bluster of the investors wanting to chop Intel up: they will find a swift and full rejection from the government unless their plan includes selling the assets to another US firm.
TSMC building a fab in the US won't be "good enough" - the US military will not allow the security of our country to be in the hands of a foreign corporation.
Now whether Intel remains a dominant player? Who knows, but they aren't going anywhere. I wouldn't be even a little bit surprised if for instance the 3-letter agencies cloud contracts suddenly included a clause that all of their infrastructure must run on Intel CPUs.
I'm not saying it's right, I'm not saying it's fair, but I don't see any other outcome.