The prime minister of the United Kingdom, armed with the Royal Prerogative, does not need Parliament's assent to lead Britain into war. The president of the United States, holder of an office designed to keep "prerogative" powers in check, assuredly does.
Yet history will apparently write that, in the late summer of 2013, the prime minister sought permission and, when Parliament denied it, receded from the field -- and that a president scorned to ask, and went ahead with an act of war.
This paradox shows that American intervention in Syria is fraught with legal, as well as military, danger -- and that constitutionally, as well as in foreign-policy terms, it may be a problem with no good solution.
Before discussing American constitutional law, we should admit that the world situation is terrifying, and the arguments for American intervention -- alone, if need be -- are powerful. Syria has apparently used chemical weapons against civilians on a mass scale -- a crime against humanity. Use of chemical weapons is a "red line" not only to Obama but in international law; perhaps only the threat or use of nuclear weapons would be a worse violation of the laws of war. The United Nations, created and empowered to deal with just such an emergency, is paralyzed because two great powers, Russia and China, have shameless decided to pursue short-term self interest and defend the criminals in defiance of the world.
Does that crisis in some way create a new legal regime, a change both in international law and in American constitutional norms?
I think it's pretty clear that an American attack, without the sanction of the United Nations, the support of allies, the authorization of Congress -- or, it must be said, much hope of meaningful success -- would violate the Constitution. As Jack Goldsmith writes in Lawfare, it "will push presidential war power beyond where it has gone before."
Since the very beginning of the Republic, presidents have used force to defend American ships, military personnel, and civilians abroad. No one doubts, in 2013, that a commander-in-chief could order emergency military action to defend Americans, or the nation as a whole, from attack. And sometimes that emergency power has been stretched to include a real-time response to fast-moving events that threaten world order, even if U.S. targets are not involved. Time enough, when seconds count, to consult Congress after the dust has cleared a bit.
American presidents have also used force, without consulting Congress, to fulfill American treaty obligations. The most famous example was President Harry Truman's decision to commit American troops to the war in Korea without requesting authorization even after the fact. Truman argued that he was obliged, under the U.N. Charter and a Security Council resolution, to come to the aid of South Korea, and that that obligation superseded Art. I § 8 cl. 11's reservation of the power to "declare war" to Congress alone.
President George H.W. Bush, in seeking authorization for the first Gulf War, claimed that he did not need it, because of a Security Council resolution authorizing action against Kuwait. (The bluff worked, and Congress approved the war.) President Bill Clinton committed U.S. forces to intervention in the former Yugoslavia, and never sought authorization. In Kosovo, there was no Security Council resolution, but Clinton claimed to be acting under the NATO Treaty and at the request of the other nations of the Balkans.
How do these precedents apply to Syria? Not well. First, the crisis is undoubtedly an emergency -- but it is not an emergency that demands presidential action within minutes or hours. The U.S. is preparing in deliberate, even stately, fashion for a carefully choreographed attack on Syria; there's plenty of time for the president to invoke the "extraordinary occasions" language of Article II § 3 and convene a special session of Congress.
Internationally, a strike against Syria would go well beyond the flimsy justification offered even for Kosovo. The Security Council has not authorized action against Syria, and will not. Even with U.N. personnel producing the evidence that the Damascus regime has used chemical weapons, the U.S. apparently does not plan even to ask for permission to use force. The nations in the Middle East region have not asked for U.S. intervention. NATO does not support it -- and for heaven's sake, not even Britain will stand with the U.S.
To sum up: U.S. citizens and military personnel are not under attack. It is not a split-second emergency. The President does not face a request from the Security Council, NATO, the Arab League or even the Organization of Eastern Caribbean States.
This is precisely the kind of situation for which the Framers of our Constitution designed its division of authority between President and Congress. Sending our missiles against Syria is an act of war. If it is to be done, Congress, not the president, should approve.
We are, of course, a long way from Philadelphia 1787, and much of what the Framers thought and intended is now obscure. But there's not much question they gave the power to commence war to Congress. The idea of a single chief executive arose within the first week of the Convention, and John Rutledge of South Carolina declared that "he was for vesting the Executive power in a single person, tho' he was not for giving him the power of war and peace."
This theme carried through. The Framers gave Congress even the minor powers that go with making war -- prescribing military discipline, issuing letters of "marque and reprisal," etc. The Committee of Detail gave the entire power to "make war" to Congress, not the President; Madison moved the change to "declare," saying he did so to make clear that the president would have power "to repel sudden attacks." Before the vote to change that language, Elbridge Gerry spoke for many when he said he "never expected to hear in a republic a motion to empower the Executive alone to declare war."
That is the power that, signs suggest, Barack Obama will exercise sometime this weekend or next week.
It's important to acknowledge the pressures on the president. An international legal system that does not punish and deter the use of sarin gas is not worthy of the name. The established mechanisms have failed. We may be facing the equivalent of Italy's attack on Ethiopia with poison gas, which revealed the bankruptcy of the League of Nations and set the world on the course for World War II. Weighed down by the specter of what will happen if no one acts against Bashar al-Assad, Obama may believe he dare not risk rejection from a dysfunctional Congress.
If that is his rationale, however, he should say so, not claim some pernickety new exception to the Constitution. He should, perhaps, say that the president of the United States is also de facto Prime Minister of the World, with the prerogative to defend sovereign peace, and that he must act when others do not.
It's not much of an argument, but it may be the best he has.
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