To overgeneralize, in foreign policy I consider Susan Rice and Samantha Power to be "liberal interventionists." What is American power for, if it is not to do good in the world? (Rice at center, Power at left in Reuters photo.)
The liberal-realist president has now elevated two prominent exponents of a liberal-interventionist view different from his own. Does this suggest a change in overall Administration policy? I doubt it (despite an argument that it might, from Fred Kaplan). The available evidence also suggests that -- ever more so the deeper he goes into his service -- Obama knows and trusts his own judgment, even to a fault. So you can argue that it's a positive sign that a president is comfortable enough to surround himself with people he trusts personally and who will present a range of views. Eg Rice on the one side, Hagel on the other, Kerry and Biden somewhere else, etc. That's the positive side of today's news.
The negative side? The NSA PHONE SURVEILLANCE STORY!! For the moment, this quick post by Joshua Foust makes good sense to me. Central argument: the Congress keeps voting for these surveillance rights. This is the fruit of a decade's worth of open-ended "war on terror." More to come.