What do you base his popularity on?
As I said, the national mood. I read about our Presidents and their connection with our nation's mood, then I make the assumption of if they were popular or no.
McKinley went to war, the nation wanted war, he was popular.
Harding promised "Normalcy", the nation wanted "normalcy", so he was popular.
Taft did not appease TR enough, the nation loved TR, so Taft was unpopular.
You are forgetting Teapot Dome.
Which broke, very conveniently, after his death. Which is why nobody likes Harding now, but he was loved at the time.
