"Established by Article I of the Constitution, the Legislative Branch consists of the House of Representatives and the Senate, which together form the United States Congress. The Constitution grants Congress the sole authority to enact legislation and declare war, the right to confirm or reject many Presidential appointments, and substantial investigative powers."
Presented by the Library of Congress, Congress.gov is the official online portal for U.S. federal legislative information, including current and recent legislation, schedules, and representatives.
House of Representatives and Senate
Current and recent (back to 1993) Congressional bills and resolutions are available on FDsys.gov for the House and Senate.
Calendars for both the House and Senate are available on FDsys.gov.
Current legislation, including sponsors, bill text, finding and contacting your representative, and calendars: House of Representatives / U.S. Senate
List of roll-call votes (how each representative voted) and the dates they did so: House members / Senators