Almost all of the resources described in this guide are freely available. The few that are limited to use by the St. Mary's community are labeled with this graphic: Some resources are located at the Sarita Kenedy East Law Library on campus.
Congress.gov is the go-to site for Congressional information past and present. There is only some historical content that has not yet migrated from Thomas, the old main Congressional site, but it will before Thomas is retired in July, 2016. Thomas links will automatically redirect to Congress.gov, but you can still use Thomas for now; just use the link below.
Congress.gov has great new features and more content. Generally speaking, it is set up for efficient browsing if you don't have the exact information (a bill number, for example) that you need. Just limit using their wide variety of facets to whittle your search results down.
Congress.gov also offers a set a nice videos explaining the legislative process.
The Sunlight Foundation is a non-profit and non-partisan organization that works for greater transparency and openness in government. They "massage" freely available government information to make very useful and interesting tools for keeping track of what the government is doing.
Other Blume Library guides cover these aspects of government information:
Within specific sections of this Congress guide, there are links to other guides dealing with particular types of information that have been developed by agencies and other libraries.
There are some institutions associated with Congress that produce very useful material for researchers at all levels: