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,

Iran's rulers are also facing a string of other crises - energy and water shortages, a collapsing currency, military setbacks among regional allies and growing fears of an Israeli strike on its nuclear facilities - all intensified by Trump's tough stance.

Ministers from Iran, Russia and China meet in Beijing to discuss Tehran's nuclear programme and call for end to U.S. sanctions.