Not in any real way. Obama is not even close to lacking that much intelligence. He could probably beat you at a game of chess while he talks himself out of a speeding ticket at the same time. If you think our president is a dunt you may want to look closer. Taking third hand information from the Internet is not your best option.
No, I think he said he had VISITED 57 states, when he probably meant 47. I don't think you should really use that as "dirt" considering politicians are under a lot of stress and you can't really blame him for making a stup1d mistake. If you dislike a politician, you should dislike them because of the way they run things, NOT because of silly mistakes that aren't worth anything.
Yes. You can view it on YouTube or other sites . He was campaigning and said he had already visited 57 states and had one more to go. He was exhausted and made a mistake. Some say this proves he is a Muslim. Something to do with 57 states of Islam. I think that's really stretching it. He has also mispronounced Corpsmen 3 times in one speech. Now that was funny since he is the head of the Armed Forces.