Sketching Connections Between US House and Senate Tweeps

Following on from Sketching the Structure of the UK Political Media Twittersphere, I did a quick trawl of US Senators and Congress members based on the lists maintained by @HuffPostPol, and visualised the connections between them in Gephi using the Force Layout algorithm:

Node size is proportional to betweenness centrality measured over the directed graph where edges go from one person to a person they follow. The edge set is limited to edges between members of the four @huffPostPol lists: republican-senators, democratic-senators, democratic-members, republican-members.