US President Joe Biden told Arab leaders on Saturday that Washington would remain fully engaged in the Middle East and would not cede influence to other world powers. “We will not walk away and leave a vacuum to be filled by China, Russia or Iran,” Biden said during a summit in Jeddah, on the Red Sea coast of Saudi Arabia. The summit, the final stop on Biden’s Middle East tour, brings together the six members of the Gulf Cooperation Council as well as Egypt, Jordan and Iraq. Biden had been looking to use it to discuss volatile oil prices and outline his vision for Washington’s role in the regi…