Applying to Graduate School with misdemeanor charge?
I probably would not worry about this at all.  Conviction of a misdemeanor (as opposed to a felony) would not disqualify you from any of the U.S. graduate programs that I have been familiar with.  Schools will not necessarily even ask about misdemeanor convictions on their applications, nor will they be running criminal record checks on their applicants.  It is, of course, possible that some faculty reading applications at some schools may be vociferously opposed to admitting anyone with any kind of criminal history.  However, most places simply will not care.