Truman certainly added the "police" part.
I saw a PBS special on Wilson, and learned a lot. I'd not known much about him. He was an intellectual...and not always appreciated as such. He was the child of a minister...and felt almost as if he had the divine right of rule. While he was on the "stump" to sell the treaty of Versilles (at the end of WW1) to the people he had a massive stroke, and his wife kept him in seculsion, would not let anyone have access to him. All info went through her...both to and from. SHe basically ran the country. Things happened in those days that wouldn't have a chance now. If you have a chance to see it, its interesting.