As companions to Ken Burns’ The Roosevelts on PBS the following books, all available on Kindle are highly recommended.
The Bully Pulpit: Theodore Roosevelt, William Howard Taft, and the Golden Age of Journalism
Traitor to His Class: The Privileged Life and Radical Presidency of Franklin Delano Roosevelt
The Defining Moment: FDR’s Hundred Days and the Triumph of Hope
1932 convention book
The Florida Squeeze 
The Bully Pulpit is a great read. Combined with “The PBS documentary by Ken Burns it is scary to see how much the current Congressional mess and corruption of today mirrors 1901 through 1908 (TR’s term in office). We could certainly use a TR in the White House today
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