The Iranian constitution details the powers of the supreme leader and makes it clear that he plays the key role on foreign and domestic policies. However, his powers are not unlimited. There is a clear division of powers in the Iranian system of government, proper checks and balances, mitigating the influence and concentration of power into the hands of one person or institution.
“Iranian elections remain as relevant as ever,” Hossein Mousavian, Asharq Al-Awsat, June 11, 2013.