While Poland can trigger Article 5, and current US admin will most likely tell them to shove it, maybe deploy some forces there. US weakening ties with EU is going to make nuclear war less likely.
Even if the next US president was very gung ho about it, the fact that Trump got elected again means the US isn't a stable partner. You don't want to enter a ten years war where every 4 years your ally might just decide to leave you hanging.