Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: .@POTUS Obama describes his temperament as 'steady &amp; on the buoyant side.'
This tweet contains emotions: 
joy, optimism