Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: He totally knew about it'. Trump finally gets revenge for his son-in-law's prosecution/imprisonment and throws Christie under the bus.
This tweet contains emotions: 
anger