Yesterday our lead item on Donald Trump’s popularity linked to the wrong article. We’re sorry about that. Explore our interactive tracker here.

Even by his loquacious standards, Mr Trump is having a motor-mouth day. He has already berated NATO and claimed Iran is desperate for a ceasefire; shortly he will make a televised address. Markets think the war will end imminently, but the president has a history of feints. What if he escalates and sends troops to seize Kharg Island, an important oil-export terminal? Our defence experts explain how that could go spectacularly wrong.

Between all that chatter, Mr Trump carved out time to do something a sitting American president has never done before: attend an oral argument at the Supreme Court. With eyes sometimes closed, he listened as the justices grappled with one of his most controversial executive orders—seeking to limit birthright citizenship. We explain why he will probably lose.