All of our Aircraft Carriers ALREADY go around S. America or Africa to get to Taiwan...because ALL of our aircraft carriers are too wide to fit through the canal.
The same is true of pretty much all of the supertankers bringing imported oil.
And, as it is, the Chinese Navy could easily be crushed by just a part of the US Fleet that is already based on the West Coast.
The Panama Canal isn't quite the strategic linchpin it used to be.