But why hasn't the US come close to trying given their overwhelming advantages in firepower? To me, and I suspect to Iran, it seems clear that it's because the Trump regime fears the domestic costs of doing so. He's already feuding with formerly loyal cronies in the media over a dozen military deaths and $4 gas; can he really afford to risk what the response might be to hundreds or thousands of dead American soldiers with little to show for it but an extended oil crisis?