The next U.S. president will confront a deeply unsettled world, from a Middle East in turmoil to a Europe struggling to contain an outbreak of terror attacks. Russia is expanding its influence and challenging its neighbors. China is flexing its powers both militarily and on the trade front. With many Americans weary from more than a decade of war, a miscalculation on any of these pressure points could have combustible consequences. Here’s a look at where the two candidates stand on foreign policy.