Byron York sums up Obama's lackluster performance at today's rally:
Obama's speech was halting, wandering, and humorless; the president looked as if he didn’t want to be there. There's no doubt the crowd was excited to see Obama, but he seemed so hesitant and out-of-rhythm at the top that it appeared he might have been having teleprompter trouble
It did seem like Obama had teleprompter trouble at the 2:45 mark of this video when he appears to draw a blank on what state he was in: "I want to thank the great senior senator from ... this ... (laughs) ... I know where we are--Massachusetts--the great commonwealth of Massachusetts."
Then later around the 16:30 mark, Obama discusses the stimulus package and accidentally says, "Martha's opponent would have voted against those taxes." (YouTube here.) He immediately realizes he meant to say that the $700 billion stimulus bill is a tax cut rather than a tax hike (he was closer to the truth the first time) and adds: "he would have voted against those tax cuts--would have voted against those tax cuts."
These are not big gaffes by any means, but for a politician known for a silver tongue, Obama certainly seemed off his game.