Per the Vietnam situation:
The lefties always argue that we'd never declared war, and so we had no legal obligation to remain engaged in that conflict. A "police action" doesn't compel us to accept the bounds of any treaty; rather, it allows us to temporize until we can wriggle out ofthe problem.
One can accept that argument if one ignores the moral aspects of obligations to allies.
I pray we make up ground by remaining true to the free people of the ROC, not to mention helping keep them free and protecting our own vital interests in that regard.