That said, where the public stands has relatively little to do with the US's actions. the Iraq and Afghanistan invasions were knee-jerk actions made supported by people who were acting under information that later turned out to be totally false. The current drone strikes weren't ever a serious ballet issue. In fact, I daresay most conflicts in which the US has been engaged in the last 40 years were initiated with very little regard as to public consent beyond "will they riot if we do this?"