If you are going to pardon Hillary Clinton for anything be forthright and do that before the election.

The President has the power to pardon. He's obligated to act with the greatest integrity. If he sees fit to pardon a presidential candidate for anything the only ethical path is to do that before an election, not 60 days or so after. The voting public has the right to know. The President has the obligation to inform the electorate prior to the election.