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Harold Koh, David Barron, and Martin Lederman, all legal scholars with a record of emphasizing limits on presidential power, changed their views when they became executive branch lawyers in the Obama administration. Koh found a way to justify President Barack Obama's unilateral use of force in Libya, while Barron and Lederman provided justification for the targeted killing, without judicial hearing, of U.S. citizens identified by the executive branch as senior operational terrorist leaders. This article considers whether these changed approaches can be justified by the scholars' changed roles.