The world has seen how unreliable the US is. Its not even just the tarrifs, its the tarrifs applied at random, based on how happy the Don is. The world has seen the "checks and balances" don't exist, a populist leader can do whatever they want for any reason and has no accountability.

The horse has bolted, you can't ctrl-z this.

In this case, there are laws which he claims allow him to do what he's doing (some disagree, and that's moving through the courts, though with the current Supreme Court who knows). Those laws _can be revoked_, though. The meme that congress is powerless against him is not really entirely correct.