WASHINGTON — Florida again. And Ohio and Iowa and New Mexico and maybe Wisconsin or one or two other battleground states. All are possible settings for a replay of the court contests and recounts that marked the 2000 election. The neck-and-neck presidential election could end, as it almost always has through American history, with a clear winner and a gracious loser on Election Night. But armies of lawyers are ready for the alternative with an eye to fighting several Florida-style postelection legal wars at once. Lawyers set up command posts in key states weeks ago, and they have already filed...