I haven't been totally following the race for Republican nomination but this video is kind of telling about politics in general.
The reason I say it's rather telling is regarding the stock answers he jumps to when he's struggling.
Q: "Do you agree with President Obama on Libya or not?"
...(after struggling & trying to clarify things that happened)
A: "I do not agree with the way he followed it for the following reasons, no that's a different one" ...
..."I would have done a better job of determining who our opposition is"...
Basically he was struggling to think about what went on so jumped straight into assuming that his opponent was wrong. In my opinion it is quite clear that he didn't have an informed opinion on the conflict so decided the only way out of the question was to criticise Obama without knowing what he was talking about.
He alludes later to the fact that the President of the United States of America is privy to information that other people aren't, and once in possession of this knowledge a person's opinion may change. This is a very sensible point, but the rest of this was handled terribly. I wonder if his other controversies are having an affect on his performance. Irrespective of this and whether or not it makes him fit to be President, surely the President of the USA needs to have at least a grip on current foreign policy matters? Apparently this clip has "gone viral" one can only assume that it will damage his chances.