Dennis Ross, a former top diplomat for the George H W Bush and Clinton administrations, will become the Obama administration’s top envoy on the Middle East, an internal email from Mr Ross’s current employer has revealed.

Mr Ross, who previously served as the US envoy for the Israeli-Palestinian conflict, is set to take a wider role as Hillary Clinton’s top adviser for the Middle East as a whole. Ms Clinton herself is due to appear before the Senate Foreign Relations Committee for her confirmation hearing for Secretary of State next Tuesday.