President Obama’s most significant foreign policy accomplishment, the Iran nuclear deal and its potential to usher in new relations in the Middle East, might well depend on our own Midwest. U.S. states are likely to complicate implementation of our policy commitments with Iran. And unwinding state-imposed impediments during an election year, like everything else, will be harder to accomplish. Recently, the State Department contacted each U.S. state to ask for cooperation in revising sanctions on Iran. It is not starting well.