Former Iranian President Mahmoud Ahmadinejad has defied the advice of the Islamic Republic's supreme leader and registered to run again for the nation's presidency. Here's why it matters:INTERNAL POLITICSAhmadinejad's decision runs directly counter to advice offered in September by Iran's Supreme Leader Ayatollah Ali Khamenei, who has final say over all state matters. ___WORRIED NEIGHBORSSunni Arab states in the Gulf remain highly suspicious of Iran, especially after it secured its landmark nuclear deal with world powers. Israel is staunchly opposed to Ahmadinejad, who questioned the scale of the Holocaust and called for Israel's destruction as he presided over a massive expansion of Iran's nuclear activities. Half the 12-member council's members are selected by Iran's supreme leader and half by the country's judicial chief with parliament's approval.

Source: Fox News April 12, 2017 11:48 UTC