If Newt Gingrich's career in public service proves anything, it is that he will never be caught saying “Oops.” Gingrich is currently rising to frontrunner status in the Republican presidential primary largely because he's willing to talk about any subject at any time, is ready to do so with some measure of linguistic facility, and has sufficient self-regard to exploit every opportunity to demonstrate his rhetorical command. He has managed to leverage the televised debates to his benefit by acting like a professor before an unprepared lecture hall of students, condescending to the moderators by treating every question as a logic exercise. And so, however improbably, his Ph.D in history has earned the status of an important credential to the Republican Party.
But if Gingrich has amply proven his academic talents, he has also demonstrated their limitations. The Republican Party should not mistake his communication skills with evidence of real knowledge, or even of good reasoning. Gingrich may be a master of academic exercises—his ability to make bookish references and formulate long sentences demonstrate as much—but that does not mean he knows what he is talking about.
Gingrich's patterns of speech are largely analytically acute, and sometimes aesthetically interesting, but substantively, they are very often lacking. Language is supposed to be a package that carries substance, but Gingrich is sometimes so pleased with his uninterrupted stream of words, that he mistakes it for an actual flow of ideas. This, sadly, is an affliction endemic in academia, where too many spend too long trying to score points in petty intellectual fights; the further the substance of the debate recedes, the faster the self-satisfaction of the participants grows.
http://www.tnr.com/article/politics/97429/newt-gingrich-smart