Daniel Larison had this post at The American Conservative on the nature of some undecided voters.
If I worked for the Gary Johnson campaign, anecdotes like this one would drive me up the wall. Here are two voters whose preferences are in broad agreement with Johnson’s views, neither of them is particularly swayed by appeals to social issues one way or the other, and they still don’t know how they’ll vote. I can understand why a “strongly antiwar” voter wouldn’t support Obama, and it makes sense that someone drawn to Ron Paul’s ideas isn’t ready to vote for Romney, but how could either of them still be undecided when there is a Libertarian candidate with views so close to their own?