The last time he landed in the Middle East, he was President Obama’s advisor. But last week Joe Biden returned as President of the United States to a region that has since seen notable geopolitical shifts and new alliances. At Israel’s Ben-Gurion Airport, hisfirst stop, stumbling and mumbling before finally finding the podium, Biden soon reassured Israelis – once again – that the only constant in the changing Middle East is the US’ unconditional support for Israel. To make the point, Biden felt it was necessary to fumble into his bag of cliches to remind everyone that, indeed, one needs not be…