Interesting report from Howard Kurtz:

All traveling campaigns have a bubble-like quality, but Obama seems unusually insulated. One moment of absurdity came Tuesday, when reporters on the press bus were asked to dial into a conference call in which Obama announced a congressman’s endorsement — even though the candidate was nearby and just as easily could have delivered the news in person to the bus captives. Obama answered a few questions, but reporters are generally placed on mute after they speak so there can be no follow-up.