President Donald Trump is insisting that he must be personally "involved" in choosing Iran's next leader, and social media users wondered exactly how that would work.Ayatollah Ali Khamenei was assassinated at the start of the joint U.S.-Israeli Operation Epic Fury, and the 79-year-old president told Axios that he would not accept the assassinated supreme leader's son Mojtaba Khamenei as a replacement."They are wasting their time," Trump said. "Khamenei's son is a lightweight.""I have to be invol...