Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: Retweeted Dr. Rand Paul (@RandPaul):\n\nStop fueling a Middle East arms race and worsening an already horrific refugee crisis in Yemen.
This tweet contains emotions: 
anger, disgust, fear, sadness