How so? The President is still a citizen of the state he is from, and thusly must follow the same laws, or can a President go out and kill someone because he's somehow not accountable to the laws you and I are?
I've read through the laws in Texas in regards to getting out of jury duty because I hate doing it, and there are no regulations in it that say being the President absolve you of your CIVIC DUTY.
He is just a man, just like any other politician is just a man or woman. They are no more important as an individual, only in the JOB they hold.
Think of it this way. It;s like saying the CEO of Exxon shouldn't have to serve jury duty because he makes an ass load of cash and he has more important things to do for him and his stock holders.