Why did so many people think Warren G. Harding wasn't fit to be president?

After President Warren Harding's death, Calvin Coolidge was left to deal with the fallout of his predecessor's corrupt legacy.

As global tensions spiral toward the brink, Eisenhower must decide how far he’s willing to go to project American power.

When the Cold War’s first great showdown erupts, Truman is forced to choose between backing down or risking everything to stand firm.