American and Turkish officials are discussing a joint effort to clear Islamic State fighters away from Turkey ’s southern border, a senior State Department official said on Monday. The official did not provide details or explain what role American air power might play, but he said that discussions with Turkish officials had progressed after several rocky months. “We are looking for things we can do in a very material and tangible way,” the official said. “We want to get those extremists off their border. We want to look at a way that we can do that cooperatively with them.” Senior officials from the United States-led coalition that is fighting the Islamic State group are scheduled to meet in Paris on Tuesday […]