US President Donald Trump on Thursday insisted he should have a role in picking Iran’s next supreme leader after the killing of Ayatollah Ali Khamenei, whose son he said he found unacceptable. “Khamenei’s son is a lightweight. I have to be involved in the appointment, like with Delcy,” Trump told Axios in an interview, drawing a comparison to Venezuela, where interim president Delcy Rodriguez has cooperated with him under threat of violence after the US ousted her boss, Nicolas Maduro. Trump...