Not an idiom
Yet another that’s not how it works.
Trump said Friday he may impose tariffs on countries “if they don’t go along with Greenland.”
Tariffs aren’t about forcing other countries to accept one rogue nation’s aggression.
Also wtf is “go along with Greenland” supposed to mean? They are “going along with Greenland”; it’s Trump’s plan to annex Greenland that they’re not going along with, for obvious reasons. Saying “Greenland” when he means “my determination to attack and absorb Greenland” is typical of his mind-blind sloppy way of assuming everyone sees what he sees, even when our refusal to see things the way he sees them is the very thing he’s talking about.
The Trump administration has previously said it is weighing multiple options, including utilizing the U.S. military, in order to take over the Danish territory.
Sir, sir, Denmark is an ally; you’re not supposed to take over territory that belongs to an ally.

Tariffs will mean fuck all if people decided they don’t want to trade with us anymore, anyway. Canada has made a new agreement to import Chinese EVs with no tariff, in exchange China has dropped tariffs on grains to be imported.
The world is going to decide just to let us go to hell in our own little sandbox.
The US once had 13 military bases in Greenland, and it’s now down to one. I guess previous administrations, including Trump’s, completely misread the situation. Under the treaty with Denmark, the US could expand its military presence anytime and there’s no limit on the number of troops. It’s hard to see how acquiring Greenland adds one iota to US national security.
This is all about distracting Europe from the war in Ukraine and throwing sand into NATO’s gears. Putin couldn’t have written a better script.