Is it possible that Trump is merely employing these hradnosed arm-twisting tactics to bully Iran into submission and squeeze a few more concessions from them such as ceasing the long range ballistic missile tests, sponsoring groups like Hezbollah and others, threatening Israel etc.
Remember Trump used similar arm-twisting tactics with N. Korea and he is now seeing fruits – climb down by Kim Jong Un.
Trump hopes Iran will negotiate and cede more ground, then he will get back on board the new look nuclear deal – with extras.
He will then take a noisy victory lap taunting everybody about his tough negotiating acumen - which in actual facy is just brazen brinkmanship whose flip side is a real risk of plunging into war if the other side were to stand their ground.
Isuni yilu yi maa me muyo - ni Mbisuu