US President Donald Trump put his son-in-law Jared Kushner and long-time friend Steve Witkoff in charge of resolving the war in Ukraine and a stand-off with Iran. On Thursday, they juggled those momentous issues within hours of each other.Dispatched to Geneva, Switzerland, Kushner and Witkoff met Iranian officials at the Omani ambassador’s residence in a bid to seal a deal over Tehran’s nuclear programme and avoid what could be a massive strike by US and Israeli forces.Hours later, they...