US
Iranian judge and cleric, who is subject to US sanctions, takes office in August
Premier says he looks forward to strengthened ties with Iran for regional peace, progress and prosperity
Raisi, 60, takes over from Rouhani in August as Iran seeks to salvage its tattered nuclear deal
Presidential race has since narrowed to a two-horse race
Rouhani is still seen as the frontrunner, but he faces a tougher than expected challenge from Raisi