Trump has no logic to anything he does. If he thinks there's a dollar to be made, he grabs at it. That includes Canada, Greenland, Panama, Arctic shipping channels. Tax cuts will add $3-4 trillion to the debt (
Bloomberg). Cancelling social infrastructure reduced costs by 1%, but the fallout might cost 10 times more - no one knows.
Republicans, who enjoy taunting others, are not interested in logic. They merely wait for the next moment that they can laugh at the same taunting - the one-liner that amuses his followers day after day, month after month. Nothing else phases them.
Trump wants Canada's arctic shipping lanes, but he has no reason to demand anything of Canada. He starts with unjustly enacting Emergency National Security based on 43 kilos of fentanyl. This opens the door for him to violate the free trade agreement and impose tariffs. Tariffs, he said, would make Republicans rich, impoverish Canada, and force Canada to become a USA state under Trump control. This is a funny joke for Republicans. If fentanyl didn't convince Republicans that Canada needs to be annexed, then false claims that the USA subsidizes Canada with $200 billion annually got their attention, convincing them that Canada needed to be "punished."
Then Trump turned to Greenland and decided that he may as well use military force - expecting that no one will stop him. Then greed kicked in, and he decided on tariffs for the entire world. When that wasn't enough, he sent letters to all other countries telling them to adhere to his political ideology, or they would not be allowed to trade with the USA. Realizing that other countries might form new trade partnerships, he said he would add further tariffs to all countries that have cooperative trade agreements that exclude the USA. Now he says that he's going to change the constitution, or start a global war, so he can remain in power for more than 2 terms.
The man is constantly trying to plug holes in his illogical, chaotic plan; constantly escalating the situation.
As 15 countries in Asia form a new trade alliance, Trump starts ranting about tariffs on their ships. It's as though he's spinning out of control because he has no control over anything other than the looming USA recession and increasing cost of living. He probably thinks that he can start and stop wars at his convenience.