And it’s a pretty good one. Worth a bit of your time.
Or consider this: did Obama have power to order six mnonths’ worth of airstrikes on Libya without a declaration of war or any other approval from Congress? One might check the Constitution and the laws and treatises that have been written on the subject, or you could look at history and note that, again, Obama did precisely that. So yes, he did have the power. Moammar Ghadaffi’s corpse might argue that it was an illegal exercise of power, but I specify that it’s a corpse on purpose – Obama’s actions had real-world consequences in making something happen, which no one stopped him from doing and for which he never paid a penalty.