Governments will change, people on the top might change. The question is whether they will face any consequences for their actions. Will the US as a whole face any consequence of its actions. Like the consequences other countries face when they do the stuff America is doing right now.
Or will it be back to normal as soon as the regime changes.
Will there be any lasting effects in how the world deals with US?
If it was a democratic Iran they’d leave them be unless they wanted to control the oil. Then it’s regime change by any means.
Maybe. Trump isn’t exactly motivated by trying to protect democracy.