The American president, the Commander-in-Chief of the United States Armed Forces, is practically a foreign policy dictator. You can start wars without going through Congress. Congress and the public will complain, don't kid yourself about that, but it will be too late. You can end wars—or at least choose to stop fighting and let them continue without you. You can order daring raids against the likes of Osama bin Laden if you think you know where they're hiding, you can forge and unmake alliances, and you can initiate all kinds of black ops that the public is unlikely to discover as long as they don't catastrophically fail.

What the Next President Must Do About the World (November 2016)