Well, if Clinton is the (D) candidate then it will be very hard. If it is someone that is further left, then it is possible to get some of their votes.
And read my post again, I did not say the Libertarian vote as a whole, simply a few of those votes, and they can get quite a bit of the Independent vote. The Libertarians that I run with do not believe for one second that there will be a 3rd party, or that they will totally change the GOP, they are working at the state level because they know that their socially liberal/fiscally conservative ideas work better at that level of government, so they are looking at the moment for the most fiscally conservative, get us the hell out of the Middle East candidate that there is...so, you get a solid GOP candidate in there that is ALL ABOUT energy independence, and TRUE fiscal conservative ideas, you will have someone that can get those votes or at least a better % than the last 2 candidates were able to get.