Excellent editorial by the NYT on what role Iran plays in American Middle Eastern “strategy.”
Trump administration officials worry that the Iranians, aided by the Syrian president, Bashar al-Assad, will seek control of enough territory in two adjacent countries, Syria and Iraq, so as to establish a land bridge from Tehran all the way to Lebanon. There they could resupply their Hezbollah allies, thus enlarging their regional influence.
I tend not to think that an emergence of a “Persian Crescent” is as big of a deal as other tend to make it be. Either way, without any conceviable strategy towards Iran in operation, the U.S. should cooperate with Tehran on overlapping interests (i.e. stability in Iraq, defeating ISIS, and frankly, keeping Assad in power) while the contrasting interests appear to be on the backplate (nuclear spread, Iranian meddling in Yemen (at least I haven’t heard of any Iranian meddling in the conflict as of lately) and state sponsored terrorism directed at Israel).