Teddy would be such a funny (but not in a Trump laughingstock way) president in the modern era. This was basically his style:

• Foreign Policy: "Do what I want or else"
• The megacorps of the gilded age: "Either break up willingly or I'll break you up myself"
• Environmental reform: "Stop fricking up the environment or I'm gonna frick you up"
• Working with Congress: "Stop being a bunch of ignorant twits and do what I want or else I shall give you a righteous thump about the head"
• The American People: "I'm gonna make your life better whether you like it or not"

I don't know how he'd do as POTUS in 2022, but it would be interesting to watch and would probably end well.