The Interactive Advertising Bureau had the ear of Senate Minority Leader Mitch McConnell early this year, and donated $2,400 to the Kentucky Republican. The online ad industry trade group's Political Action Committee, which is perhaps most concerned with influencing potential federal privacy legislation, doesn't shy away from Democrats, though. IAB representatives met at an event held this morning with Anthony Brown, Maryland's Democratic Lt. Governor. The McConnell event, however, was more exclusive. "He [McConnell] is obviously a very important leader in the Senate," said IAB general counsel and SVP Mike Zaneis. "He took the time to come and do an event specifically with the advertising community up in New York and we…