General

Let’s start with the Administration’s newly minted theory (h/t Marty Lederman for posting the operative statement) that the statutory 2001 AUMF authorizes the President’s announced campaign to use force against ISIL in Iraq and Syria. The AUMF does not plausibly extend to ISIL. In addition to the reasons my friends Jens Ohlin, Jen Daskal and others have already...

I'll pile on in deploring the legal justification for the expanded operation against the Islamic State. No one is buying the AUMF basis. In addition to Jens below, Jack Goldsmith and Jennifer Daskal have devastating critiques here and here. The justification could have lasting negative consequences for interbranch relations in the war powers context. The 2001 AUMF involved a context in...

Last night I blogged about Obama's speech that outlined the administration's plan to contain and destroy ISIS. I noted that Obama announced his intention to ask for congressional authorization for the plan while steadfastly maintaining that he did not need this authorization. He was vague about why. In my blog last night, I presumed that he was asserting that he...

A few minutes ago, President Obama addressed the nation to explain his new policy to contain and destroy ISIS. He is walking a fine line: more airstrikes but no direct ground invasion. Instead, he will fund, equip, and train foreign troops to engage in the ground fighting themselves. While this is a politically popular view (ground troops are always risky),...

Russia has skillfully managed to devote military support to the separatists in Eastern Ukraine. Just how much support -- and what kind of support -- is unclear, since Russia formally denies that they are directly involved in the ongoing hostilities there. Ukrainian officials have insisted that they have specific proof that Russian troops and their equipment have not only crossed the...

It looks like President Obama learned his lesson. Last summer he decided to seek Congress's advance approval for a strike against Syria's chemical weapons capabilities. Political support for the operation evaporated. Obama looked weak and waffly (the decision was taken on a dime after a 45-minute South Lawn stroll with chief of staff Denis McDonough, almost certainly not vetted through...

Your weekly selection of international law and international relations headlines from around the world: Africa Rebels of the Somali Islamist group al Shabaab have pledged allegiance to their new leader after his predecessor was killed and said their enemies would reap the "bitter fruits" of revenge after Ahmed Godane's killing, a spokesman said. Boko Haram militants early on Saturday attacked another town in...

As predicted last week, it was only a matter of time before someone on the Hill dropped a bill to terminate the citizenship of Americans who are fighting with the Islamic State. Ted Cruz has taken the plunge, so it will probably get a little more attention than if some backbencher had adopted the cause. Press statement here; text of...

In late June, I wrote a long post responding to the notorious memorandum in which the OLC attempted to provide a legal justification for killing Anwar al-Awlaki. I argued that although the AUMF likely provides the US military with a public-authority justification for violating 18 USC 1119, the foreign-murder statute, it does not and cannot provide the CIA with that justification. In defence of that conclusion,...

This week on Opinio Juris, we welcomed Jens Ohlin to our masthead. Kevin asked whether it's time to reconsider the al-Senussi admissibility decision, linked to a Rolling Stone article about Chevron and the Lago Agrio case, and criticized attempts to assess the proportionality of an attack based on combatant:civilian kill ratios. There was more on the Gaza Conflict in a guest post by Liron Libman,...

Anyone familiar with foreign relations law hears the common refrain that treaties almost never supersede statutes under the last-in-time rule. Until recently, it was certainly my understanding that the ancient Supreme Court case of Cook v. United States was the only significant example in which a self-executing treaty trumped an earlier conflicting statute. But my recent research on the...

Last week, 45 Fijian peacekeepers deployed as part of a 1,200-member U.N. force monitoring a buffer zone between Syria and Israel were captured and are being held by Nusra Front rebels.   (Hat tip to Theodore Christakis here at the ESIL conference in Vienna for raising the issue yesterday in the ESIL / SHARES Peace and Security Interest Group Seminar.) Rebels have...