He seems intent to throw political hand grenades everywhere, anyone that will come after him aiming to undo his actions will have their work cut out for them. There is no use predicting what the results of the 2026 and 2026 elections will be right now but Trump evidently has great ambition and as always wants to shake up the status quo but this time compared to his first term he seems far more energetic about achieving his goals. If he succeeds he will achieve recognition only few other Presidents can match but if he fails he could be vilified for ages to come.
The hand grenades are part of his strategy that hasn't changed since he laid it all to bare in his book 'The Art of the Deal'. He never negotiates from a position of strength and always sets himself up with leverage down the line.
If Mexico want the tariffs removed, then he wants a wall building, for example. Or Canada needs to open up a route to the Northern seas for ships and trade. America has never had a President like Trump, because he's a businessman, not a politician.
The core issue isn't us being tied to too many nations, it's that our "friends" need to work a little harder on their friendship. We have been footing the bill for decades already to ungrateful allies and Trump is here to collect their dues. He tried this his first term but they just laughed him out of the room, so this term he is back with a vengeance.
You're tied to too many nations, you say it yourself here. Your 'friends' are numerous and taking collective little bites - that are bigger than they could be, at the detriment to America.
Trump doesn't want an isolated America, he wants an industrious America that is the undisputed indusrial, economic, cultural, and military leader in the whole world. He wants an America that is respected and not one that the whole world mooches off of.
The way to achieve that is to be isolationist. Tsung Tzu states that "a country divided must unite. A country united must divide". In current year, the country is a borderless hells cape known as 'the west'.
An event is coming, be it a financial collapse that we're over-due for, a multi-nation war or just mass civil unrest similar to the fall of the Soviet Union. The only way to protect yourself from this is to isolate and let the world burn down around you. Japan saved itself by turning isolationist.
There are little to no negatives to America rolling up the shutters and telling the world to eat shit. The only negatives will be on the rest of the world, and with that in mind, Trump has the ultimate bargaining chip, which he won't use while he's in a position of strength.