The U. S. Congress Votes Database from The Washington Post is a database of U. S. Congressional votes and related information covering from 1991 to the present. It offers aggregated data for each Congress, as well as individual data for each member. For each chamber, you can browse the data in a variety of ways, including by bill number, member name, members by state, most-voted-on-bills, key votes, and vote margins.
In addition to vote data, the database provides detailed information about each member’s voting record, including how the member voted on key issues, how many votes the member missed in the most recent Congress, and the percentage of time the member has voted with his or her party. Brief biographical information and links to related Washington Post articles are also included for each member.
The site also publishes an RSS feed for every current member of Congress, so you can get notified each time that person votes, and each feed also includes the member’s position in the last ten votes. A feed of the most recent votes of both chambers is also published. The database and feeds are updated daily while Congress is in session.