By Parisa Hafezi (Reuters) -For Iran's clerical leaders, engaging with the "Great Satan" to hammer out a nuclear deal and ease crippling sanctions may for once be the lesser of two evils. Though it harbours deep mistrust of the United States,

It was Iran's weak economy that pushed Khamenei to give tentative backing to the nuclear agreement struck with major powers in 2015, leading to a lifting of Western sanctions and