During late 2007 and early 2008, there were three cases challenging the date of the Florida presidential primary. The state insisted on holding the primary in January, even though the Democratic National Committee rules said no state could hold such a presidential primary except for New Hampshire.
One of the cases was filed by a Democratic voter against the state of Florida, and argued that the state was disenfranchising Democrats by holding the primary on a date that contradicted the wishes of the party. The case was held moot on October 5, 2009. It was Ausman v Browning, U.S. District Court, northern district, 4:07-cv-519. The case never got a substantive decision, because in the earlier stages of the case, the primary was held before the court could reach a decision.