Cuba.
In a "rational" world the quagmire of Iran would make such a move unlikely, but with this administration the prospect of an "easy win" could have them just go for it.
After all, nobody's stopping them. The Constitution only remains so that the 2A fanatics can LARP at being patriots.
If the US is allowed to annex Cuba the PRC has a right to take back Taiwan.
Our country is currently enforcing a blockade that is murdering children in Cuba. It is all so sickening.