To understand what happened in US government between 1924 to 1929, I would suggest you start in 1913. No era is understandable in isolation.
The subjects below will cover from just before WWI through most of the 1920s. If you continue to open links in the articles, such as those in Wikipedia, you will protract your research behond those subjects into little known, but sometimes important and enlightening details. A lot happened and much of it still affects us today. For sites concerning each subject, simple go to the bottom of each article and open all the External Links into separate tabs. If you enjoy research, you could be at this for a week or more.
Search by subject:
Federal Reserve Banking Act of 1913
Paul Warburg
Nelson W. Aldrich
Federal Income Tax
The Sedition Act of 1918
Palmer Raids
Women’s suffrage, 19th Amendment, 1920
Woodrow Wilson
League of Nations
Prohibition, Volstead Act, 18th Amendment
Anti-communism (1920s)
KKK march on Washington, DC
Warren G. Harding
The death of Warren Harding
The Teapot Dome Scandal
Albert Fall
Calvin Coolidge (and his administration)
Herbert Hoover (and his administration)
That should get you started. Enjor the journey.