Cooling it
Iran for the moment appears to be taking a low key approach to responding to new US sanctions aimed at its ballistic missile program and support for Hizbollah. It is continuing to test missiles and radars, without however any indication as yet that they are nuclear capable. That is the minimum we should expect of them.
Iran as I understand it has already blocked Americans from entering, in response to Trump’s travel ban. They can do much more. It is easy for the Iranians to hassle the US Navy in the Gulf and the strait of Hormuz. US troops are particularly vulnerable to Iranian surrogates in both Iraq and Afghanistan. Hizbollah maintains capabilities to strike the US not only in Lebanon but also elsewhere, including inside the US. Use of these capabilities could significantly escalate the conflict with the US, which would likely respond with military force, either openly or clandestinely.
Whatever happens, the likelihood is a significant deterioration of already pretty bad relations between Washington and Tehran. Trump, who denounces the Iran nuclear deal regularly in stentorian tones, may even be aiming to get Iran to renounce it. This would leave the Iranians free to pursue nuclear weapons without however any real possibility that the US could restore the multilateral sanctions that brought Iran to the negotiating table. Military action would quickly become the only option for stopping the Iranian nuclear program from producing everything needed for nuclear weapons.
We should therefore appreciate the low-key approach the Iranians have taken so far. By far the best bet for the US on the nuclear weapons front is strict implementation of the deal. Even hard-line opponents of it are coming down on that option. It just doesn’t make any sense at all to do anything else.
Even with full implementation (on both sides), relations between Iran and the US are unlikely to improve during a Trump administration. The President’s National Security Adviser, General Flynn, is Tehran’s favorite American general, because appears to have accused President Obama of creating and supporting the Islamic State, a standard Iranian propaganda talking point. But he is also ferociously anti-Iranian and I would say a certifiable Islamophobe. He appears to be driving Iran policy, at least for now, but Steve Bannon, the white nationalist (I would say supremacist) chief White House strategist no doubt concurs.
Trump himself is stridently anti-Iranian, which scores him points both domestically as well as with the Israelis and Gulf states. Apart from the nuclear deal, these constituencies, as well as many others, have two problems with Iranian behavior: its aggressive support of proxies in the region (especially in Syria, Yemen, Iraq, and Bahrain) as well as its continued support to Hizbollah worldwide.
Iran is still a revolutionary regime aiming to maintain its semi-autocratic brand of theocracy, arm Shia populations in other countries to resist abuse, and use those surrogates to defend itself. It sees the US and Israel as its most dangerous main enemies, with the Gulf states a close second. At least in American eyes, there has been no sign of moderation in Iranian rhetoric and behavior since the signing of the nuclear deal. President Rouhani is enjoying at least some of its benefits to the Iranian economy, but the Supreme Leader, the Iranian Revolutionary Guard Corps, and most of the Majles remain just as staunchly and stridently anti-American as Trump is anti-Iranian.
No, I don’t see much likelihood this will change. The main thing now is to prevent increased tensions between the US and Iran from exploding into armed conflict. Cooling it is the best we can hope for.