A secret service agent not being a smiling prop for Harris at an event he most probably detests? How many secret service agents don't look stern and focused while actively protecting those in their charge? This guy was in a no win situation, if he did have a smile on his face the left would have attacked him for not being serious about protecting the Cackler.
Harris would have been a great villain on the 60's Batman TV show, ridiculous and inept.....The Cackler.