Obama is about to take stage at DNC!

[steven787]

izaaz101 said:

Look where his pinky is, lol.

@PDF (or anyone else who can answer the question)
Why do Americans register themselves as a Democrat or Republican, and is that something that you have to do?

 

You don't have to do it to vote, but most states require that you are a party member to vote in a primary.  Remember, we're not parliamentary and we don't have run off elections.