The polls are open. After more than a year of campaigning and hundreds of million of dollars spent, twenty four states participate in either caucuses or primaries on this Super Presidential Tuesday.

Higher than normal turnout is expected if voting in early states and the number of hits on a Barack Obama YouTube video are any indication.

Will I am, front man for the Black Eyed Peas has received nearly a million hits since Saturday on this Obama video using his theme of 'Yes I Can.'

In a final push, Hillary Clinton hosted a national town hall that connected 21 other townhalls, all in primary states, via satellite.

A confident Republican John McCain is predicting victory, while Ron Paul is hoping for a big turn. He is highlighting his second place finish in the weekend's Maine caucuses.

The Green Party participates in its first ever primary. Undeclared candidate Ralph Nader is on the ballot in California and Massachusetts. He will be battling it out with Cynthia McKinney, who is on the ballot in four state.

Most candidates will spend much of the day campaigning in their home states.

Democrats will allocate 2000 delegates to be divided proportionally. 1000 delegates will go to the Republican nominees mostly in a winner take all fashion.