The point of rightwing zombie lies like "Obama can't talk without a teleprompter" (despite vivid evidence to the contrary) is, as Duncan says, to provide a hook for "journalists" to base their stories on. But to be effective, the lie has to join up with some widely-accepted public perception of the person being lied about. In Al Gore's case, people were prepared to believe that he was a wimpy tree-hugger who had to consult with a woman on what clothes to wear. But what are the rightwingers trying to say about Obama? That he's not as smart as he seems? Or that he's inauthentic, scripted, rigid? Maybe both. Look for clues in future lies and talking points.