Interesting: from an article in today's Times,
 

When deciding where to run his television advertisements, President Bush is much more partial than Senator John Kerry to crime shows like "Cops," "Law & Order" and "JAG." Mr. Kerry leans more to lighter fare, like "Judge Judy," "The Ellen DeGeneres Show" and "Late Show with David Letterman.
 
Crime shows appeal to the Bush campaign because of its interest in reaching out to Republican men who are attracted to such programming. By contrast, the Kerry campaign is more interested in concentrating on single women, who tend to be drawn to shows with softer themes.