By Paul Wallace and Christine Burke, Bloomberg News Iran chose Mojtaba Khamenei, the hardline son of the assassinated Ayatollah Ali Khamenei, as its new supreme leader, signaling Tehran won't back down in a war now raging across the Middle East and causing a surge in energy prices. The choice was quickly criticized by U.S. President Donald Trump, who is under mounting pressure as oil prices rise to near four-year highs and fears grow of a new inflation crisis.