The media is abuzz with speculation that one of U.S. President Donald Trump's first orders of business in office will be to relocate the U.S. Embassy in Israel from Tel Aviv to Jerusalem. Actually doing such a thing, however, is not as easy at it might appear. A relocation would not sit well with Palestinians, who also lay claim to the holy city, nor would it be welcomed by countries such as Jordan and Egypt that have struggled to juggle friendly ties with the Palestinian territories, Israel and the United States. And no matter how well-protected the embassy itself might be, stoking ethnic and religious tensions by transferring the diplomatic site to Jerusalem could bring U.S. missions and citizens in the restive region directly into the line of fire....