Iran names new Supreme Leader

According to Iranian state media, Mojtaba Khamenei, the son of the late Ayatollah Ali Khamenei, has been appointed to succeed his father as the Islamic Republic's top authority. Just hours before the confirmation, US President Donald Trump claimed Iran's new supreme leader would not last long without his approval. As geopolitical tensions rise, global markets are reacting. Who is Mojtaba Khamenei? Why does Trump believe he can influence Iran's leadership? And what could this leadership transition mean for Iran, the region, and global energy markets?