Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: From what I know of the man, I have to assume that @realDonaldTrump has had a heated argument with his own penis. #sad
This tweet contains emotions: 
sadness