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Originally posted by: jillyf
The grammar sites are wrong. If you are referring to him as a person, he is Barrack Obama. If you are referring to what he does, he is President. Period. If he met with the President of Mexico, they would both be President.
If you are referencing senators (or presidents) in general, or in the abstract, use lower case. If you are referring to two of them specifically, it is "the Senators went back to Washington...
E.g. "The president of a corporation usually has the power to endorse checks." "Can you get me a list of presidents who have been impeached?"
Since, in your original quote, you were referring specifically to the current President of the United States, the word is President.
The grammar sites are 100% correct and you can't prove they are wrong. Give it up and go take a writing class. You really need it.