Actually, I saw Perun do a segment on Canadian defense, particularly as the Arctic ice recedes. This is going to pose some additional challenges for them (e.g. they need more Coast Guard and icebreakers). Especially as several nations try to stake a claim to the Arctic (especially Russia).

So, yes, they are going to have to start patrolling their northern islands (not really a border), lest someone squat and say 'this is ours now'.

Now friendly areas like Taiwan that China has expressly and historically said are theirs and rattles its sabers over periodically are different.

I suspect the convict will roll-over. However, it would be great if he continued support of Taiwan, recognized them as an independent country (Xi will go apoplectic), and continue asserting free navigation in the SCS (plus support the Philippines, and refuse to accept China's "dotted line"). He is enough of bumbler that he may just recognize Taiwan if Xi annoys him. He certainly didn't care that moving our embassy to Jerusalem was going to cause an uproar.