Donald Trump has eight days before he will be forced to make up his mind on Iran. He wants to end the unpopular war, but claimed on Thursday he was under “no time pressure” to do so. In fact, the US president is bound by the 1973 War Powers Resolution, which limits his ability to wage war without congressional approval to 60 days. That deadline passes on May 1, 60 days after his formal notification of the war to Congress on March 2. It will compel him to choose one of four options – seek congressional authorisation to continue the...