In case you missed it, Chief Executive Obama has completed the adoption of Mr. Bush's policies on arbitrary arrest and indefinite detention, deciding not to seek law supporting it. Like Mr. Bush, Mr. Obama claims the power to arrest anyone, anywhere, without cause or warrant, and with no right to appeal or judicial process, if, in the sole purview of the Executive branch, it and/or he decide it's appropriate for national security.* Like Mr. Bush, Mr. Obama claims this authority under the post-September 11 authorisation of force. Unlike Mr. Bush, Mr. Obama is not yet claiming these powers are inherent in statements, tho' iirc his legal team has danced towards that in court.
*: According to some reports, this power is to be used sparingly, and mostly towards only those already held, but this is purely a matter of policy and not of claim of law. C.f. previous commentaries on political power theory.