I love sorting random people/characters into Harry Potter Houses. It's just a Good Thing To Do. I think an argument could be made for Nixon being a Ravenclaw because he was incredibly smart and the smart kind of tips into 'I am smarter than these jackasses why aren't they doing what I say?' type of ambition.

Obviously Slytherin makes lots of sense too, but I think the argument could be made.

Also I so agree with Hamilton's placement. The man is without a doubt my favorite Founding Father, but he's such a Slytherin.

John Adams would be a Ravenclaw though.