@Eggplant (and Larry):

What I wanted to see done with Iran about three years ago, was a form of siege.

Blockade Iran both seaward and landward.
Allow nothing in or out. Also seize all their financial assets.

Once that started taking effect, then disable
their one remaining refinery.

With all that done, they would be fundamentally incapable of making mischief either directly or indirectly. The Mad Mullahs will have to surrender one way or the other.

BTW: Should that refinery be taken out overtly or covertly? Judgement call, I suppose.

However, if overtly is the answer, then I would
heartily recommend that the US do the job and do it with a nuke.

Nuclear weapons are for destroying property, not people. A refinery would be a very appropriate target. And then those folks who have convinced themselves that we are too chicken to every use nukes would rethink their positions in a hurry.

Wonder if it is too late for all that by now?