congress-bills

Overview
This is a temporal hypergraph dataset, which here means a sequence of timestamped hyperedges where each hyperedge is a set of nodes. In this dataset, nodes are US Congresspersons, and hyperedges comprise the sponsor and co-sponsors of legislative bills put forth in both the House of Representatives and the Senate. Timestamps are in ISO8601 format. The dataset was derived from James Fowler's data.
Statistics
Some basic statistics of this dataset are:

Number of nodes: 1,718
Number of timestamped hyperedges: 282,049
There is a single connected component of size 1,718
Source of original data
Source: congress-bills dataset
References
If you use this dataset, please cite these references:

Simplicial closure and higher-order link prediction. Austin R. Benson, Rediet Abebe, Michael T. Schaub, Ali Jadbabaie, and Jon Kleinberg. Proceedings of the National Academy of Sciences (PNAS), 2018.
Connecting the Congress: A Study of Cosponsorship Networks. James H. Fowler. Political Analysis, 2006.
Legislative Cosponsorship Networks in the U.S. House and Senate. James H. Fowler. Social Networks, 2006.