Good points on Iran and State. In the final analysis, one would have to say the engagement has been the only constant. Iran, since its takeover by French interests, has posed a constant threat to American interests. I personally think the USA should bankrupt France and then finish putting the political screws to Iran, and then the French as well. This would have positive effects in both the Middle East and Europe.
We may have blown our wad; politically and militarily.
It's up to the American electorate to decide where we go from here.