Trump knows he won, right?

Donald Trump beat Hillary Clinton for the presidency over a year ago, but he just can't seem to let her go.  Answering questions about whether he would be under oath in front of the Mueller Inquiry, his answer was to liken himself to his defeated opponent.  "You mean like Hillary was under oath?".  As he went on to reveal, Hillary wasn't under oath.  He sounded triumphant in telling reporters this nugget.  But then, Hillary wasn't president and wasn't being investigated for collusion with a foreign power.  And after a year of Trump, her email use really doesn't seem quite so significant compared to the traumas of the Twitter President.