  Network theory provides a powerful tool for the representation and analysis
of complex systems of interacting agents. Here we investigate the United States
House of Representatives network of committees and subcommittees, with
committees connected according to ``interlocks'' or common membership. Analysis
of this network reveals clearly the strong links between different committees,
as well as the intrinsic hierarchical structure within the House as a whole. We
show that network theory, combined with the analysis of roll call votes using
singular value decomposition, successfully uncovers political and
organizational correlations between committees in the House without the need to
incorporate other political information.
