Cato's Doug Bandow writes in Salon why conservatives should vote for Kerry:
Serious conservatives should deny their votes to Bush. "When it comes to choosing a president, results matter," the president says. So true. A Kerry victory would likely be bad for the cause of individual liberty and limited government. But based on the results of his presidency, a Bush victory would be catastrophic. Conservatives should choose principle over power.
Whole thing here (sitting through 20 second ad required for free day pass).