Professional athletes and campaign donations

as observed by Tyler Cowen. His hypotheses:

1. Sports figures don't want high marginal tax rates for the upper income brackets.

2. Currently the disproportionate representation of African-Americans in sports is throwing more support to Obama than a Democratic candidate normally would receive.

3. Perhaps athletes are less likely to come from coastal elites, who are becoming increasingly Democratic.

4. Republicans have historically shown less interest in regulating professional sports than have Democrats.

5. The sport of football most embodies the ethic of martial virtue and so football players and executives are especially drawn to McCain.