He won't need one, because Taiwan's semiconductor industry will be destroyed during the takeover and require a decade or more to rebuild.

"make" => "try to and fail", as some people are harder to maneuver than, it seems, the American public

The UK thought they had a 50 year agreement with China to guaratee Hong Kong's democracy: https://en.wikipedia.org/wiki/Sino-British_Joint_Declaration

Turns out if the other country decides they are altering the deal, and you don't have any leverage - the bit of paper isn't worth all that much in practice.

Would you repeat the same feat with Taiwan, if you were in Trump's place?