Thanks for being clear. Although politically opposed to much of the current situation, I actually think the mutuality in defence of Taiwan and the China Sea issues are there.

Trump mistakes the upsides of demanding change here. The cost is tiny set against the mutual benefits. And arguing about the price is the Churchill (or is it Oscar Wilde?) quip about prostitution. We're not actually debating treaties yes or no: we're debating Trump leveraging the treaty with Taiwan, and NATO, as a weapon to win control in a domestic dispute between Democrat centerists and Republican minimal government low taxers. It's an opportunistic argument, not a principled one.