For ease of access, below are some links to useful sites for paying attention to public issues in the United States.
The White House. The official site of the President of the United States. Provides access to speeches, executive orders and other presidential actions.
GovTrack. An independent source, GovTrack.us tracks the United States Congress and helps Americans understand what is going on in their national legislature. An excellent site for learning how members of Congress voted, and also for learning the status of particular pieces of legislation.
Tracking Congress in the Age of Trump. How often every member of the House and the Senate votes with or against the president, from Fivethirtyeight.com.