We should not be trying to invade and occupy a nation of 50 million people. That is beyond the capability of our force structure. If your idea is to declare war, then declare it and claim all the legal rights that go with a declared war. We would have the right to interdict commerce, confiscate assets, institute air and naval blockade. Irani insurance rates would go thru the stratosphere. Their trade would evaporate. their treasury empty. Air strikes could be made against their internal infrastructure, destroying transportation and disabling communications. These things are possible with a formal declaration.
blah blah blah blah.. Same old crap from the armchair general blowhards who they know how to run a war rather than the professional generals..