Obama Can't Speak Without a Teleprompter

Every time I have a discussion with a Mccain supporter they have to mention that Obama cannot speak without a teleprompter.

Of course their evidence of this is "Cmon, he cant do it" or "Have you heard him speak without a teleprompter, he's a moron" or "he thinks there are 57 states". The first time I heard this argument I was completely dumbfounded. I try to explain to them that, yes I've heard him speak many times without a teleprompter in interviews, in speeches and in debates and that not only does he speak adequately but also elequently. Sometimes I feel like rational arguments cannot reach these people. They'll find an excuse to feel how they want to feel towards him and wont let any amount of evidense dissuade them.
Is there any way to reach these people? It seems like they get all their information from random emails and right wing radio yahoos. They think his wife is a terrorist, they think he is unamerican and there is no convincing them otherwise.
I have one friend who thought Michelle Obama had this racist thesis paper and that it was hidden from the press. I looked it up on Google, it was the first result. I read it, found nothing inflamitory and sent it to her. She still thinks Michelle Obama is a racist. This is somebody with an Engineering degree and a good job. Is there anything I can do or say?
I'm rambling because i'm frustrated. I'm frustrated that my friend who is an Engineer in New York is fooled by this garbage. I'm frustrated that people vote with their gut and not their brain. Do people follow the republican party with the same fervor with which they follow their religion? Is there any reaching these people? For the love of God, somebody tell me how. I
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