Earlier quoted context omitted.
If china declared Puerto Rico to be it's ally and started building military bases there without US permission, the US would do more than threaten to invade Puerto Rico, it'd do it immediately
Dude, this is blatant whataboutism. Puerto Rico is in no way equivalent to Taiwan, and I suspect you know that. Taiwan is a sovereign, independent, democratic nation. The Chinese Communist Party has never had political control over Taiwan. It just claims the right to overrule the right to self-determination of 23 million people because it feels like it. The Commonwealth of Puerto Rico is an unincorporated U.S. territ…
Cuba is a much better one, it's not even hypothetical.