J.D. Vance had two jobs last week: get an Iran deal and keep Hungary’s Viktor Orban in power. Neither happened for the US vice-president. The 41-year-old Vance looked exhausted as he left Pakistan on Sunday after 21 hours that failed to produce an agreement with Tehran to end a war he had never wanted to begin with. At a terse press conference in Islamabad, Vance delivered the “bad news” and took just three questions before getting on a plane for the long flight back home. But just before...