The United States wants to remain engaged in the Middle East and push back against the influence of China, Russia and, crucially, Iran, US President Joe Biden declared on Saturday as his Middle East tour drew to a close. Iran was the main target of his criticism as he offered support to the region on its dealing with Tehran. “Let me say clearly, that the United States is going to remain an active engaged partner in the Middle East,” Biden said at the Gulf Cooperation Council (GCC) meeting in Jeddah, Saudi Arabia. “We will not walk away and leave a vacuum to be filled by China, Russia or Iran,”…