While Bill Clinton may still be pondering the meaning of the word “is,” a federal court in Miami is trying to define what the word “reasonable” means.

The ruling in this historic case could well determine how secure elections are all over the United States for years to come.

At issue in the American Civil Rights Union’s lawsuit against Broward County, Florida, whose weeklong trial ended last Wednesday, is what constitutes “reasonable” measures that must be taken to ensure accurate and up-to-date voter lists.