Libertarian candidate Bob Barr has been making the rounds on radio row here near the XCel Energy Center. At first I was surprised to see a rival party’s presidential candidate, walking around and doing media from within the convention of the GOP. But then I realized what a brouhaha it would be if the Republicans didn’t allow Barr in. As it is, he was hardly surrounded by followers. In fact, it seems safe to say that Barr has been a non-factor in most of the polls. On radio row, the hosts seemed generally welcoming – but Jon Voight and the rest of the cast of “An American Carol” seemed to be much more in demand.