But who will it be happiest for? We'd like your predictions for the final results from the most eagerly awaited day in the US political calendar (at least since the Iowa caucuses).
How many states will Hillary Clinton, Barack Obama and John McCain take - and which ones? What will the national vote look like? Add your speculation and educated guesses in the comments below.
Note to Ron Paul fans: Ron Paul is not going to win the nomination. Sorry. But why not let us know where you think he will place his best result.
