Why does everyone say Trump and Hillary and not Donald and Clinton?

This is the dumbest topic for a question ever.

Because there's already a Clinton in the white house before duh

Because the name Clinton is associated with Bill. And people dont know Donald as well.

Well, one reason is the Bill Clinton was President, so if you say 'Clinton' people might think you are referring to Bill Clinton. Hillary is less ambiguous. Also there are a lot of Donalds in the world, Donald Duck, etc. If you say 'Trump', people know who you are talking about.

We already HAD a President Clinton. To avoid confusion, it's Trump and Hillary. This way, we can leave Silly Willy out of the equation.

i say Hillary and the Donald