In Rolling Stone, Paul Krugman has a (longish) fair but mostly positive assessment of Obama's record. Somewhat surprising for a guy that supported Hillary in the primary and has been fairly critical of Obama. I'll say that i think the section on "national security", which i think is meant to include the NSA and state secrets stuff (or else those areas are left out altogether), is pretty weak. Krugman acknowledges that it's not his area of expertise, but there's a lot more to say there, and brushing past that will definitely leave the overall assessment more positive than it should be (from a liberal/civil libertarian perspective, of course).