I stumbled upon this link to an Atlantic Cities article which maps areas of the country that favor one professional baseball over all others. Since this is opening day and we have been talking about the Houston Astros and the Washington Nationals possible spring training facilities in Palm Beach County, I thought this would be of interest. Here is the map which is worth some study. By the way, there are many people in metropolitan Washington, D.C. that would like to come to Florida in March and catch up on their favorite team.
Check out the link to the larger map referenced in the first paragraph.