The US-Israeli attack on Tehran on Saturday marks a turning point for President Donald Trump, who is wagering that a war – the kind he once vowed not to start – will strengthen his second-term agenda.In a break from his campaign promises to keep the US out of foreign wars, Trump decided to attack – despite what Arab mediators described as significant progress in nuclear talks to Tehran, and in the face of polling showing most Americans oppose fresh military action.It came less than two months...