not calling you stupid, caroljo, I said do you realize how stupid that makes you look? When you post that the president doesn't know there are 50 states, that makes you look like you are digging deep to toss a ridiculous insult, hence, it makes you look stupid. Not, meaning it makes you look brainless, it just has a stupid appearance, like when something happens in public and you inadvertently do something that makes you look stupid. (like looking all around for keys that are in your hand)
I never saw the clip before, but it was obvious to me that he meant 47, didn't anyone ever say that before? It looked to me like he thought they were laughing at him for implying there were 48 states, so he adds that he won't be going for Alaska and Hawaii, clarifying why he said 47, not realizing he said 57.