There is no more reason to have US forces in Poland, than there is in Germany...or Latvia...or Bulgaria...or Romania etc.
Our commercial interests are minimal, and our political interests are better served elsewhere.
The USA leaving is exactly what the EUSSR wants. They have had a plan in place for decades to unite the militaries of all of the member states under a single command, led by the German high command; and leaving them free to do that means that it will come together very rapidly.
The very notion of a united Europe is about anti-Americanism. Leaving them free to create their anti-US military cannot be, and is not, a plus for US interests to say the very least (and that’s even understating it).
“Our commercial interests are minimal, and our political interests are better served elsewhere.”
Oh boy, now you’ve done it.