After US and Israeli strikes on Iran, the Ayatollah Ali Khamenei is dead, and the Middle East is in chaos. But who will replace the Supreme Leader?

As Tehran faces a power vacuum, who is likely to be Donald Trump's desired candidate and what is his ultimate long-term aim for Iran.

Will we see a new Supreme Leader, an internal revolution, or a return to the Iranian monarchy?

Here's what you need to know about who could lead Iran, and how President Trump is influencing the country's future.