Not only has the Iranian regime been exporting terrorism by shipping weapons and manpower to various proxy wars around the region; it's also been funding and supporting itself through a very lucrative world wide trade in illegal narcotics such as cocaine.
Before Obama, this criminal regime was being held in check. Obama spent eight years implementing a radical policy in which an Iranian backed nuclear hegemony over the Middle East was a foregone conclusion; it could only be 'managed' or delayed, not stopped.
