Prime Minister Benjamin Netanyahu of Israel issued his first official statement about the potential deal between the United States and Iran, which has caused worry and consternation in Israel. He said that he spoke with Mr. Trump about what he called a memorandum of understanding to “reopen the Straits of Hormuz and the upcoming negotiations toward a final agreement on Iran’s nuclear program.” Mr. Netanyahu said both leaders agreed that any such accord must compel Iran must dismantle its nuclear sites and remove its enriched uranium, which could be used to make a nuclear weapon.