We obtain communities by maximizing modularity using the GenLouvain code with a resolution-parameter value of γ=1. The color of each node indicates the mean media PCA score of its GenLouvain community. We use blue to signify communities that are on the Left (i.e., ones with a negative mean media PCA score) and red to signify communities that are on the Right (i.e., ones with a positive mean media PCA score). Nodes with large in-degrees on the Left have larger values for the number of inter-community retweets divided by the number of intra-community retweets than is the case for nodes with large in-degrees on the Right. We label the public Twitter accounts.