Marco Rubio has unique power to promote peace in the world. Why isn’t he doing his job? | Simon Tisdall

As chief US diplomat, Rubio could do great good – but he hasn’t yet. His pandering and neglect are a disgrace we shouldn’t ignore Viewed from the state department in Washington DC, the world is on fire – but record heatwaves are not to blame. The unresolved Iran war has badly burned Donald Trump. His military campaign conclusively failed, energy and food prices are still rising, and a Republican rout in November’s midterm elections looms. Humiliatingly, Israel this week flatly rejected his…