The question of the Florida primary is going to the 11th Circuit Court of Appeals. The suit, brought by Victor DiMaio, claims that excluding Florida's Democratic voters and allowing some states to vote earlier than others violates the Equal Protection Clause of the 14th Amendment.
On the other hand, the DNC claims that they have the power to exclude any state that does not follow the rules, and that past court rulings upholdthe right of political parties to make and enforce their own rules as protected by the freedom of Association in the First Amendment.
The suit was filed mid-March and the appellate court's decision could take more than a month. The losing party is expected to petition the U.S. Supreme Court to review the question.

Atlanta Journal-Constitution, 03/17/08.

The rights of the national committees may not be without limit.