Intervention by the Supreme Court. They should step in immediately to stop the
voting and kick Sanjaya off the show. There is, of course, precedent for the Court's taking action when votes seem to be going the wrong way: the landmark Bush v. Gore decision.
One note, of course: The Bush v. Gore decision specifically stated it couldn't be used for other cases. I'm sure that was to stop godless liberal heathens from using it, but my, the consequences. Had they only known that seven years later, their intervention would desperately be needed . . .