All it took for your guy to left sanctions on Iran was about $5.2 billion in cash, and a wink and nod unsigned memorandum of understanding that at most just kicks the Iranian nuclear can down the road a few years.
Meanwhile Iran has Quds forces/regional proxies or what they call the "axis of resistance"/Hezbollah in Iraq, Syria, Lebanon, Yemen and the Gaza Strip. They very directly threaten U.S. ally and the only secular democracy left in the M.E., Israel.
They supply ballistic missiles to the Houthi in Yemen, and to Hezzbollah and similar elements in Lebanon. They are building and continuously practice via asymmetric warfare the closing of the Strait of Hormuz by their forces, thus shutting a major oil and trade route for the world.
They are known traders of information regarding missile technology and likely nuclear weapons technology with North Korea.
They have a deplorable human rights record.
Yet, Barrack and the Ayatollah Kerry had no problem in unilaterally lifting sanctions on them over an unsigned document that was not approved by Congress.
Hypocrisy: Thy name is LibBot Nation