United States House of Representatives

https://www.house.gov/

The House Explained (History, Committees, Rules, etc.):

https://www.house.gov/the-house-explained

United States Senate:

https://www.senate.gov/

Lobbying Disclosure via the Senate:

https://www.senate.gov/legislative/lobbyingdisc.htm#lobbyingdisc=lda

Library of Congress:

https://www.congress.gov//

https://www.congress.gov/legislative-process

Lobbying Reports -- House and Senate:

Lobbying Disclosure Home Page:

https://lda.congress.gov/LD/default.aspx

Lobbying Disclosure Log-In Page:

https://lda.congress.gov/LD/login.aspx?ReturnUrl=%2fLD%2fforms%2fClients.aspx

 

Congressional Research Service (CRS) Reports:

https://crsreports.congress.gov/

https://www.everycrsreport.com

 

Historical & Educational:

Lobbying Industry -- Written by Sen. Robert Byrd (A Must Read):

https://www.senate.gov/legislative/common/briefing/Byrd_History_Lobbying.htm