There is only one acceptable response to Wednesday’s deadly terrorist attacks in Iran: swift and unequivocal condemnation of the perpetrators, and condolences to the victims. By joining the other world leaders who have offered their sympathy, US President Donald Trump can reaffirm both America’s standing in the community of nations and its determination to defeat terrorism, whatever and wherever its …

At a time when the UK’s most pressing need is for competent leadership, it’s saddled with two of the most bungling party leaders in living memory. Even a well-run government would struggle to control the short-term damage likely to be inflicted by Brexit. Whatever happens in Thursday’s vote, there’s no prospect of a well-run government by Friday. On this evidence, …

As soon as Donald Trump withdrew the US from the Paris Agreement on climate change, eyes turned eastward. Even as the US reneges on its promises, the argument now goes, China and India will show leadership instead; they at least are committed to low-carbon growth. I wouldn’t be so sure, at least where India is concerned. It is true that …