A lot of what Trump has done can be undone the minute he’s gone. THIS, however, cannot: the fact that all of America's allies now know that in any four year period, a single man can rip up all treaties, social norms, and economic partnerships.
America is no longer a country they can trust.
America is no longer a country with which long-term deals can be made.
America is no longer a country that prioritizes peace.
Most countries will likely grow their military as a result.
Most countries will likely make deals with other countries as a result.
This damage will likely take more than a generation to START to be undone, if ever.
And THAT will be MAGA’s legacy.