(LAUSANNE, Switzerland) — German Foreign Minister Frank-Walter Steinmeier says negotiators at the Iran nuclear talks are still facing a “tough struggle,” indicating the talks are not likely to end soon. At the same time, he’s holding out hope that the sides will be able to negotiate a preliminary accord that will let them embark on a new phase of talks aiming for a final deal by June. For nearly a week, Iran and six powers have been locked in haggling over what that initial understanding should look like.