McCain has been quoted as saying “People who make under $80,000 are too stupid to understand taxes anyway” to a group of wealthy people. Could it be at a fundraiser? See the original story here.
Some people say that this is disputable. However, according to the Washington Post Campaign Tracker Calendar, Mr. and Mrs. McCain attended a fundraising dinner in Arkansas on August 8, 2008–the date in question. Sounds plausible to me.