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: I despair at the mouth foaming hostility &amp; dishonesty of those in the Leave camp, &amp; we should expose that.
This tweet contains emotions: 
anger, disgust, sadness