John S - check out my post
here or
here on Bob Barr. I think what the previous comment was referring to is his previous voting record, which like it or not, is a gauge of how that individual has stood up on a variety of issues.
Bob may be running for LP prez, but his LP cred is shaky at best. Now, let's give credit where credit is due, he has publicly apologized or completely reversed his stances on several important issues like his attacks against Medical Marijuana and his support for the Defense of Marriage Act, the Patriot Act, and the Iraq War, but I think his candidacy begs the question of whether or not this guy is truly a Libertarian or is a conservative merely pouncing on poor GOP "brand equity" and dismal approval ratings of Mr. Bush.
Again, it's nice he at least had the cojones to apologize for his freedom infringing-support of the Defense of Marriage Act and the Patriot Act and has since called for the end of the War in Iraq, as well as has begun lobbying in support of Medical Marijuana and the ACLU, but I believe you have to hold people accountable for their votes, which is why I would never vote for Hillary Clinton even if it meant putting McCain in office because she voted for the Iraq War Resolution and never publicly admitted that it was a terrible mistake.
What I am getting at is that Bob Barr is a convenient Libertarian and doesn't exactly embody the values of America like you indicated in your comment.
But I'm glad you've brought up his candidacy because I think this is an important debate - to not lose sight of the fact that we have other choices besides D or R.
Cheers.