To give you a sense of what makes this year's Super Tuesday such a big deal, 24 different states are having primaries or caucuses today. Before this, the biggest Super Tuesday had been in the year 2000, when 16 different states voted. The larger number of states is due to more states moving their primaries and caucuses up in an effort to give their voters more of a say in who the nominees will be. California was one of those states to move up their presidential primary this year, giving the California primary renewed importance.